@ralphschuler.logger.Logger.<internal>.Buffer

Interface: Buffer

Logger.<internal>.Buffer

Hierarchy

Uint8Array

↳ Buffer

Properties

BYTES_PER_ELEMENT

• Readonly BYTES_PER_ELEMENT: number

The size in bytes of each element in the array.

Inherited from

Uint8Array.BYTES_PER_ELEMENT

Defined in

node_modules/typescript/lib/lib.es5.d.ts:2155

[toStringTag]

• Readonly [toStringTag]: "Uint8Array"

Inherited from

Uint8Array.[toStringTag]

Defined in

node_modules/typescript/lib/lib.es2015.symbol.wellknown.d.ts:284

buffer

• Readonly buffer: ArrayBufferLike

The ArrayBuffer instance referenced by the array.

Inherited from

Uint8Array.buffer

Defined in

node_modules/typescript/lib/lib.es5.d.ts:2160

byteLength

• Readonly byteLength: number

The length in bytes of the array.

Inherited from

Uint8Array.byteLength

Defined in

node_modules/typescript/lib/lib.es5.d.ts:2165

byteOffset

• Readonly byteOffset: number

The offset in bytes of the array.

Inherited from

Uint8Array.byteOffset

Defined in

node_modules/typescript/lib/lib.es5.d.ts:2170

length

• Readonly length: number

The length of the array.

Inherited from

Uint8Array.length

Defined in

node_modules/typescript/lib/lib.es5.d.ts:2269

Methods

[iterator]

▸ [iterator](): IterableIterator<number>

Returns

IterableIterator<number>

Inherited from

Uint8Array.[iterator]

Defined in

node_modules/typescript/lib/lib.es2015.iterable.d.ts:270

at

▸ at(index): undefined | number

Returns the item located at the specified index.

Parameters

Name	Type	Description
`index`	`number`	The zero-based index of the desired code unit. A negative index will count back from the last item.

Returns

undefined | number

Inherited from

Uint8Array.at

Defined in

node_modules/typescript/lib/lib.es2022.array.d.ts:48

compare

▸ compare(target, targetStart?, targetEnd?, sourceStart?, sourceEnd?): 0 | 1 | -1

Compares buf with target and returns a number indicating whether bufcomes before, after, or is the same as target in sort order. Comparison is based on the actual sequence of bytes in each Buffer.

0 is returned if target is the same as buf
1 is returned if target should come beforebuf when sorted.
-1 is returned if target should come afterbuf when sorted.

import { Buffer } from 'node:buffer';

const buf1 = Buffer.from('ABC');
const buf2 = Buffer.from('BCD');
const buf3 = Buffer.from('ABCD');

console.log(buf1.compare(buf1));
// Prints: 0
console.log(buf1.compare(buf2));
// Prints: -1
console.log(buf1.compare(buf3));
// Prints: -1
console.log(buf2.compare(buf1));
// Prints: 1
console.log(buf2.compare(buf3));
// Prints: 1
console.log([buf1, buf2, buf3].sort(Buffer.compare));
// Prints: [ <Buffer 41 42 43>, <Buffer 41 42 43 44>, <Buffer 42 43 44> ]
// (This result is equal to: [buf1, buf3, buf2].)

The optional targetStart, targetEnd, sourceStart, and sourceEndarguments can be used to limit the comparison to specific ranges within targetand buf respectively.

import { Buffer } from 'node:buffer';

const buf1 = Buffer.from([1, 2, 3, 4, 5, 6, 7, 8, 9]);
const buf2 = Buffer.from([5, 6, 7, 8, 9, 1, 2, 3, 4]);

console.log(buf1.compare(buf2, 5, 9, 0, 4));
// Prints: 0
console.log(buf1.compare(buf2, 0, 6, 4));
// Prints: -1
console.log(buf1.compare(buf2, 5, 6, 5));
// Prints: 1

ERR_OUT_OF_RANGE is thrown if targetStart < 0, sourceStart < 0,targetEnd > target.byteLength, or sourceEnd > source.byteLength.

Parameters

Name	Type	Description
`target`	`Uint8Array`	A `Buffer` or Uint8Array with which to compare `buf`.
`targetStart?`	`number`	The offset within `target` at which to begin comparison.
`targetEnd?`	`number`	The offset within `target` at which to end comparison (not inclusive).
`sourceStart?`	`number`	The offset within `buf` at which to begin comparison.
`sourceEnd?`	`number`	The offset within `buf` at which to end comparison (not inclusive).

Returns

0 | 1 | -1

Since

v0.11.13

Defined in

node_modules/@types/node/buffer.d.ts:807

copy

▸ copy(target, targetStart?, sourceStart?, sourceEnd?): number

Copies data from a region of buf to a region in target, even if the targetmemory region overlaps with buf.

TypedArray.prototype.set() performs the same operation, and is available for all TypedArrays, including Node.js Buffers, although it takes different function arguments.

import { Buffer } from 'node:buffer';

// Create two `Buffer` instances.
const buf1 = Buffer.allocUnsafe(26);
const buf2 = Buffer.allocUnsafe(26).fill('!');

for (let i = 0; i < 26; i++) {
  // 97 is the decimal ASCII value for 'a'.
  buf1[i] = i + 97;
}

// Copy `buf1` bytes 16 through 19 into `buf2` starting at byte 8 of `buf2`.
buf1.copy(buf2, 8, 16, 20);
// This is equivalent to:
// buf2.set(buf1.subarray(16, 20), 8);

console.log(buf2.toString('ascii', 0, 25));
// Prints: !!!!!!!!qrst!!!!!!!!!!!!!

import { Buffer } from 'node:buffer';

// Create a `Buffer` and copy data from one region to an overlapping region
// within the same `Buffer`.

const buf = Buffer.allocUnsafe(26);

for (let i = 0; i < 26; i++) {
  // 97 is the decimal ASCII value for 'a'.
  buf[i] = i + 97;
}

buf.copy(buf, 0, 4, 10);

console.log(buf.toString());
// Prints: efghijghijklmnopqrstuvwxyz

Parameters

Name	Type	Description
`target`	`Uint8Array`	A `Buffer` or Uint8Array to copy into.
`targetStart?`	`number`	The offset within `target` at which to begin writing.
`sourceStart?`	`number`	The offset within `buf` from which to begin copying.
`sourceEnd?`	`number`	The offset within `buf` at which to stop copying (not inclusive).

Returns

number

The number of bytes copied.

Since

v0.1.90

Defined in

node_modules/@types/node/buffer.d.ts:867

copyWithin

▸ copyWithin(target, start, end?): Buffer

Returns the this object after copying a section of the array identified by start and end to the same array starting at position target

Parameters

Name	Type	Description
`target`	`number`	If target is negative, it is treated as length+target where length is the length of the array.
`start`	`number`	If start is negative, it is treated as length+start. If end is negative, it is treated as length+end.
`end?`	`number`	If not specified, length of the this object is used as its default value.

Returns

Buffer

Inherited from

Uint8Array.copyWithin

Defined in

node_modules/typescript/lib/lib.es5.d.ts:2181

entries

▸ entries(): IterableIterator<[number, number]>

Creates and returns an iterator of [index, byte] pairs from the contents of buf.

import { Buffer } from 'node:buffer';

// Log the entire contents of a `Buffer`.

const buf = Buffer.from('buffer');

for (const pair of buf.entries()) {
  console.log(pair);
}
// Prints:
//   [0, 98]
//   [1, 117]
//   [2, 102]
//   [3, 102]
//   [4, 101]
//   [5, 114]

Returns

IterableIterator<[number, number]>

Since

v1.1.0

Overrides

Uint8Array.entries

Defined in

node_modules/@types/node/buffer.d.ts:2226

equals

▸ equals(otherBuffer): boolean

Returns true if both buf and otherBuffer have exactly the same bytes,false otherwise. Equivalent to buf.compare(otherBuffer) === 0.

import { Buffer } from 'node:buffer';

const buf1 = Buffer.from('ABC');
const buf2 = Buffer.from('414243', 'hex');
const buf3 = Buffer.from('ABCD');

console.log(buf1.equals(buf2));
// Prints: true
console.log(buf1.equals(buf3));
// Prints: false

Parameters

Name	Type	Description
`otherBuffer`	`Uint8Array`	A `Buffer` or Uint8Array with which to compare `buf`.

Returns

boolean

Since

v0.11.13

Defined in

node_modules/@types/node/buffer.d.ts:752

every

▸ every(predicate, thisArg?): boolean

Determines whether all the members of an array satisfy the specified test.

Parameters

Name	Type	Description
`predicate`	(`value`: `number`, `index`: `number`, `array`: `Uint8Array`) => `unknown`	A function that accepts up to three arguments. The every method calls the predicate function for each element in the array until the predicate returns a value which is coercible to the Boolean value false, or until the end of the array.
`thisArg?`	`any`	An object to which the this keyword can refer in the predicate function. If thisArg is omitted, undefined is used as the this value.

Returns

boolean

Inherited from

Uint8Array.every

Defined in

node_modules/typescript/lib/lib.es5.d.ts:2191

fill

▸ fill(value, offset?, end?, encoding?): Buffer

Fills buf with the specified value. If the offset and end are not given, the entire buf will be filled:

import { Buffer } from 'node:buffer';

// Fill a `Buffer` with the ASCII character 'h'.

const b = Buffer.allocUnsafe(50).fill('h');

console.log(b.toString());
// Prints: hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh

// Fill a buffer with empty string
const c = Buffer.allocUnsafe(5).fill('');

console.log(c.fill(''));
// Prints: <Buffer 00 00 00 00 00>

value is coerced to a uint32 value if it is not a string, Buffer, or integer. If the resulting integer is greater than 255 (decimal), buf will be filled with value & 255.

If the final write of a fill() operation falls on a multi-byte character, then only the bytes of that character that fit into buf are written:

import { Buffer } from 'node:buffer';

// Fill a `Buffer` with character that takes up two bytes in UTF-8.

console.log(Buffer.allocUnsafe(5).fill('\u0222'));
// Prints: <Buffer c8 a2 c8 a2 c8>

If value contains invalid characters, it is truncated; if no valid fill data remains, an exception is thrown:

import { Buffer } from 'node:buffer';

const buf = Buffer.allocUnsafe(5);

console.log(buf.fill('a'));
// Prints: <Buffer 61 61 61 61 61>
console.log(buf.fill('aazz', 'hex'));
// Prints: <Buffer aa aa aa aa aa>
console.log(buf.fill('zz', 'hex'));
// Throws an exception.

Parameters

Name	Type	Description
`value`	`string` \| `number` \| `Uint8Array`	The value with which to fill `buf`. Empty value (string, Uint8Array, Buffer) is coerced to `0`.
`offset?`	`number`	Number of bytes to skip before starting to fill `buf`.
`end?`	`number`	Where to stop filling `buf` (not inclusive).
`encoding?`	`BufferEncoding`	The encoding for `value` if `value` is a string.

Returns

Buffer

A reference to buf.

Since

v0.5.0

Overrides

Uint8Array.fill

Defined in

node_modules/@types/node/buffer.d.ts:2064

filter

▸ filter(predicate, thisArg?): Uint8Array

Returns the elements of an array that meet the condition specified in a callback function.

Parameters

Name	Type	Description
`predicate`	(`value`: `number`, `index`: `number`, `array`: `Uint8Array`) => `any`	A function that accepts up to three arguments. The filter method calls the predicate function one time for each element in the array.
`thisArg?`	`any`	An object to which the this keyword can refer in the predicate function. If thisArg is omitted, undefined is used as the this value.

Returns

Uint8Array

Inherited from

Uint8Array.filter

Defined in

node_modules/typescript/lib/lib.es5.d.ts:2210

find

▸ find(predicate, thisArg?): undefined | number

Returns the value of the first element in the array where predicate is true, and undefined otherwise.

Parameters

Name	Type	Description
`predicate`	(`value`: `number`, `index`: `number`, `obj`: `Uint8Array`) => `boolean`	find calls predicate once for each element of the array, in ascending order, until it finds one where predicate returns true. If such an element is found, find immediately returns that element value. Otherwise, find returns undefined.
`thisArg?`	`any`	If provided, it will be used as the this value for each invocation of predicate. If it is not provided, undefined is used instead.

Returns

undefined | number

Inherited from

Uint8Array.find

Defined in

node_modules/typescript/lib/lib.es5.d.ts:2221

findIndex

▸ findIndex(predicate, thisArg?): number

Returns the index of the first element in the array where predicate is true, and -1 otherwise.

Parameters

Name	Type	Description
`predicate`	(`value`: `number`, `index`: `number`, `obj`: `Uint8Array`) => `boolean`	find calls predicate once for each element of the array, in ascending order, until it finds one where predicate returns true. If such an element is found, findIndex immediately returns that element index. Otherwise, findIndex returns -1.
`thisArg?`	`any`	If provided, it will be used as the this value for each invocation of predicate. If it is not provided, undefined is used instead.

Returns

number

Inherited from

Uint8Array.findIndex

Defined in

node_modules/typescript/lib/lib.es5.d.ts:2232

findLast

▸ findLast<S>(predicate, thisArg?): undefined | S

Returns the value of the last element in the array where predicate is true, and undefined otherwise.

Type parameters

Name	Type
`S`	extends `number`

Parameters

Name	Type	Description
`predicate`	(`value`: `number`, `index`: `number`, `array`: `Uint8Array`) => value is S	findLast calls predicate once for each element of the array, in descending order, until it finds one where predicate returns true. If such an element is found, findLast immediately returns that element value. Otherwise, findLast returns undefined.
`thisArg?`	`any`	If provided, it will be used as the this value for each invocation of predicate. If it is not provided, undefined is used instead.

Returns

undefined | S

Inherited from

Uint8Array.findLast

Defined in

node_modules/typescript/lib/lib.es2023.array.d.ts:240

▸ findLast(predicate, thisArg?): undefined | number

Parameters

Name	Type
`predicate`	(`value`: `number`, `index`: `number`, `array`: `Uint8Array`) => `unknown`
`thisArg?`	`any`

Returns

undefined | number

Inherited from

Uint8Array.findLast

Defined in

node_modules/typescript/lib/lib.es2023.array.d.ts:248

findLastIndex

▸ findLastIndex(predicate, thisArg?): number

Returns the index of the last element in the array where predicate is true, and -1 otherwise.

Parameters

Name	Type	Description
`predicate`	(`value`: `number`, `index`: `number`, `array`: `Uint8Array`) => `unknown`	findLastIndex calls predicate once for each element of the array, in descending order, until it finds one where predicate returns true. If such an element is found, findLastIndex immediately returns that element index. Otherwise, findLastIndex returns -1.
`thisArg?`	`any`	If provided, it will be used as the this value for each invocation of predicate. If it is not provided, undefined is used instead.

Returns

number

Inherited from

Uint8Array.findLastIndex

Defined in

node_modules/typescript/lib/lib.es2023.array.d.ts:262

forEach

▸ forEach(callbackfn, thisArg?): void

Performs the specified action for each element in an array.

Parameters

Name	Type	Description
`callbackfn`	(`value`: `number`, `index`: `number`, `array`: `Uint8Array`) => `void`	A function that accepts up to three arguments. forEach calls the callbackfn function one time for each element in the array.
`thisArg?`	`any`	An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.

Returns

void

Inherited from

Uint8Array.forEach

Defined in

node_modules/typescript/lib/lib.es5.d.ts:2241

includes

▸ includes(value, byteOffset?, encoding?): boolean

Equivalent to buf.indexOf() !== -1.

import { Buffer } from 'node:buffer';

const buf = Buffer.from('this is a buffer');

console.log(buf.includes('this'));
// Prints: true
console.log(buf.includes('is'));
// Prints: true
console.log(buf.includes(Buffer.from('a buffer')));
// Prints: true
console.log(buf.includes(97));
// Prints: true (97 is the decimal ASCII value for 'a')
console.log(buf.includes(Buffer.from('a buffer example')));
// Prints: false
console.log(buf.includes(Buffer.from('a buffer example').slice(0, 8)));
// Prints: true
console.log(buf.includes('this', 4));
// Prints: false

Parameters

Name	Type	Description
`value`	`string` \| `number` \| `Buffer`	What to search for.
`byteOffset?`	`number`	Where to begin searching in `buf`. If negative, then offset is calculated from the end of `buf`.
`encoding?`	`BufferEncoding`	If `value` is a string, this is its encoding.

Returns

boolean

true if value was found in buf, false otherwise.

Since

v5.3.0

Overrides

Uint8Array.includes

Defined in

node_modules/@types/node/buffer.d.ts:2256

indexOf

▸ indexOf(value, byteOffset?, encoding?): number

If value is:

a string, value is interpreted according to the character encoding inencoding.
a Buffer or Uint8Array, value will be used in its entirety. To compare a partial Buffer, use buf.subarray.
a number, value will be interpreted as an unsigned 8-bit integer value between 0 and 255.

import { Buffer } from 'node:buffer';

const buf = Buffer.from('this is a buffer');

console.log(buf.indexOf('this'));
// Prints: 0
console.log(buf.indexOf('is'));
// Prints: 2
console.log(buf.indexOf(Buffer.from('a buffer')));
// Prints: 8
console.log(buf.indexOf(97));
// Prints: 8 (97 is the decimal ASCII value for 'a')
console.log(buf.indexOf(Buffer.from('a buffer example')));
// Prints: -1
console.log(buf.indexOf(Buffer.from('a buffer example').slice(0, 8)));
// Prints: 8

const utf16Buffer = Buffer.from('\u039a\u0391\u03a3\u03a3\u0395', 'utf16le');

console.log(utf16Buffer.indexOf('\u03a3', 0, 'utf16le'));
// Prints: 4
console.log(utf16Buffer.indexOf('\u03a3', -4, 'utf16le'));
// Prints: 6

If value is not a string, number, or Buffer, this method will throw aTypeError. If value is a number, it will be coerced to a valid byte value, an integer between 0 and 255.

If byteOffset is not a number, it will be coerced to a number. If the result of coercion is NaN or 0, then the entire buffer will be searched. This behavior matches String.prototype.indexOf().

import { Buffer } from 'node:buffer';

const b = Buffer.from('abcdef');

// Passing a value that's a number, but not a valid byte.
// Prints: 2, equivalent to searching for 99 or 'c'.
console.log(b.indexOf(99.9));
console.log(b.indexOf(256 + 99));

// Passing a byteOffset that coerces to NaN or 0.
// Prints: 1, searching the whole buffer.
console.log(b.indexOf('b', undefined));
console.log(b.indexOf('b', {}));
console.log(b.indexOf('b', null));
console.log(b.indexOf('b', []));

If value is an empty string or empty Buffer and byteOffset is less than buf.length, byteOffset will be returned. If value is empty andbyteOffset is at least buf.length, buf.length will be returned.

Parameters

Name	Type	Description
`value`	`string` \| `number` \| `Uint8Array`	What to search for.
`byteOffset?`	`number`	Where to begin searching in `buf`. If negative, then offset is calculated from the end of `buf`.
`encoding?`	`BufferEncoding`	If `value` is a string, this is the encoding used to determine the binary representation of the string that will be searched for in `buf`.

Returns

number

The index of the first occurrence of value in buf, or -1 if buf does not contain value.

Since

v1.5.0

Overrides

Uint8Array.indexOf

Defined in

node_modules/@types/node/buffer.d.ts:2133

join

▸ join(separator?): string

Adds all the elements of an array separated by the specified separator string.

Parameters

Name	Type	Description
`separator?`	`string`	A string used to separate one element of an array from the next in the resulting String. If omitted, the array elements are separated with a comma.

Returns

string

Inherited from

Uint8Array.join

Defined in

node_modules/typescript/lib/lib.es5.d.ts:2256

keys

▸ keys(): IterableIterator<number>

Creates and returns an iterator of buf keys (indices).

import { Buffer } from 'node:buffer';

const buf = Buffer.from('buffer');

for (const key of buf.keys()) {
  console.log(key);
}
// Prints:
//   0
//   1
//   2
//   3
//   4
//   5

Returns

IterableIterator<number>

Since

v1.1.0

Overrides

Uint8Array.keys

Defined in

node_modules/@types/node/buffer.d.ts:2278

lastIndexOf

▸ lastIndexOf(value, byteOffset?, encoding?): number

Identical to buf.indexOf(), except the last occurrence of value is found rather than the first occurrence.

import { Buffer } from 'node:buffer';

const buf = Buffer.from('this buffer is a buffer');

console.log(buf.lastIndexOf('this'));
// Prints: 0
console.log(buf.lastIndexOf('buffer'));
// Prints: 17
console.log(buf.lastIndexOf(Buffer.from('buffer')));
// Prints: 17
console.log(buf.lastIndexOf(97));
// Prints: 15 (97 is the decimal ASCII value for 'a')
console.log(buf.lastIndexOf(Buffer.from('yolo')));
// Prints: -1
console.log(buf.lastIndexOf('buffer', 5));
// Prints: 5
console.log(buf.lastIndexOf('buffer', 4));
// Prints: -1

const utf16Buffer = Buffer.from('\u039a\u0391\u03a3\u03a3\u0395', 'utf16le');

console.log(utf16Buffer.lastIndexOf('\u03a3', undefined, 'utf16le'));
// Prints: 6
console.log(utf16Buffer.lastIndexOf('\u03a3', -5, 'utf16le'));
// Prints: 4

If value is not a string, number, or Buffer, this method will throw aTypeError. If value is a number, it will be coerced to a valid byte value, an integer between 0 and 255.

If byteOffset is not a number, it will be coerced to a number. Any arguments that coerce to NaN, like {} or undefined, will search the whole buffer. This behavior matches String.prototype.lastIndexOf().

import { Buffer } from 'node:buffer';

const b = Buffer.from('abcdef');

// Passing a value that's a number, but not a valid byte.
// Prints: 2, equivalent to searching for 99 or 'c'.
console.log(b.lastIndexOf(99.9));
console.log(b.lastIndexOf(256 + 99));

// Passing a byteOffset that coerces to NaN.
// Prints: 1, searching the whole buffer.
console.log(b.lastIndexOf('b', undefined));
console.log(b.lastIndexOf('b', {}));

// Passing a byteOffset that coerces to 0.
// Prints: -1, equivalent to passing 0.
console.log(b.lastIndexOf('b', null));
console.log(b.lastIndexOf('b', []));

If value is an empty string or empty Buffer, byteOffset will be returned.

Parameters

Name	Type	Description
`value`	`string` \| `number` \| `Uint8Array`	What to search for.
`byteOffset?`	`number`	Where to begin searching in `buf`. If negative, then offset is calculated from the end of `buf`.
`encoding?`	`BufferEncoding`	If `value` is a string, this is the encoding used to determine the binary representation of the string that will be searched for in `buf`.

Returns

number

The index of the last occurrence of value in buf, or -1 if buf does not contain value.

Since

v6.0.0

Overrides

Uint8Array.lastIndexOf

Defined in

node_modules/@types/node/buffer.d.ts:2201

map

▸ map(callbackfn, thisArg?): Uint8Array

Calls a defined callback function on each element of an array, and returns an array that contains the results.

Parameters

Name	Type	Description
`callbackfn`	(`value`: `number`, `index`: `number`, `array`: `Uint8Array`) => `number`	A function that accepts up to three arguments. The map method calls the callbackfn function one time for each element in the array.
`thisArg?`	`any`	An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.

Returns

Uint8Array

Inherited from

Uint8Array.map

Defined in

node_modules/typescript/lib/lib.es5.d.ts:2279

readBigInt64BE

▸ readBigInt64BE(offset?): bigint

Reads a signed, big-endian 64-bit integer from buf at the specified offset.

Integers read from a Buffer are interpreted as two's complement signed values.

Parameters

Name	Type	Description
`offset?`	`number`	Number of bytes to skip before starting to read. Must satisfy: `0 <= offset <= buf.length - 8`.

Returns

bigint

Since

v12.0.0, v10.20.0

Defined in

node_modules/@types/node/buffer.d.ts:1206

readBigInt64LE

▸ readBigInt64LE(offset?): bigint

Reads a signed, little-endian 64-bit integer from buf at the specifiedoffset.

Integers read from a Buffer are interpreted as two's complement signed values.

Parameters

Name	Type	Description
`offset?`	`number`	Number of bytes to skip before starting to read. Must satisfy: `0 <= offset <= buf.length - 8`.

Returns

bigint

Since

v12.0.0, v10.20.0

Defined in

node_modules/@types/node/buffer.d.ts:1215

readBigUInt64BE

▸ readBigUInt64BE(offset?): bigint

Reads an unsigned, big-endian 64-bit integer from buf at the specifiedoffset.

This function is also available under the readBigUint64BE alias.

import { Buffer } from 'node:buffer';

const buf = Buffer.from([0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff]);

console.log(buf.readBigUInt64BE(0));
// Prints: 4294967295n

Parameters

Name	Type	Description
`offset?`	`number`	Number of bytes to skip before starting to read. Must satisfy: `0 <= offset <= buf.length - 8`.

Returns

bigint

Since

v12.0.0, v10.20.0

Defined in

node_modules/@types/node/buffer.d.ts:1170

readBigUInt64LE

▸ readBigUInt64LE(offset?): bigint

Reads an unsigned, little-endian 64-bit integer from buf at the specifiedoffset.

This function is also available under the readBigUint64LE alias.

import { Buffer } from 'node:buffer';

const buf = Buffer.from([0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff]);

console.log(buf.readBigUInt64LE(0));
// Prints: 18446744069414584320n

Parameters

Name	Type	Description
`offset?`	`number`	Number of bytes to skip before starting to read. Must satisfy: `0 <= offset <= buf.length - 8`.

Returns

bigint

Since

v12.0.0, v10.20.0

Defined in

node_modules/@types/node/buffer.d.ts:1192

readBigUint64BE

▸ readBigUint64BE(offset?): bigint

Parameters

Name	Type
`offset?`	`number`

Returns

bigint

Alias

Buffer.readBigUInt64BE

Since

v14.10.0, v12.19.0

Defined in

node_modules/@types/node/buffer.d.ts:1175

readBigUint64LE

▸ readBigUint64LE(offset?): bigint

Parameters

Name	Type
`offset?`	`number`

Returns

bigint

Alias

Buffer.readBigUInt64LE

Since

v14.10.0, v12.19.0

Defined in

node_modules/@types/node/buffer.d.ts:1197

readDoubleBE

▸ readDoubleBE(offset?): number

Reads a 64-bit, big-endian double from buf at the specified offset.

import { Buffer } from 'node:buffer';

const buf = Buffer.from([1, 2, 3, 4, 5, 6, 7, 8]);

console.log(buf.readDoubleBE(0));
// Prints: 8.20788039913184e-304

Parameters

Name	Type	Description
`offset?`	`number`	Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 8`.

Returns

number

Since

v0.11.15

Defined in

node_modules/@types/node/buffer.d.ts:1582

readDoubleLE

▸ readDoubleLE(offset?): number

Reads a 64-bit, little-endian double from buf at the specified offset.

import { Buffer } from 'node:buffer';

const buf = Buffer.from([1, 2, 3, 4, 5, 6, 7, 8]);

console.log(buf.readDoubleLE(0));
// Prints: 5.447603722011605e-270
console.log(buf.readDoubleLE(1));
// Throws ERR_OUT_OF_RANGE.

Parameters

Name	Type	Description
`offset?`	`number`	Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 8`.

Returns

number

Since

v0.11.15

Defined in

node_modules/@types/node/buffer.d.ts:1567

readFloatBE

▸ readFloatBE(offset?): number

Reads a 32-bit, big-endian float from buf at the specified offset.

import { Buffer } from 'node:buffer';

const buf = Buffer.from([1, 2, 3, 4]);

console.log(buf.readFloatBE(0));
// Prints: 2.387939260590663e-38

Parameters

Name	Type	Description
`offset?`	`number`	Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 4`.

Returns

number

Since

v0.11.15

Defined in

node_modules/@types/node/buffer.d.ts:1550

readFloatLE

▸ readFloatLE(offset?): number

Reads a 32-bit, little-endian float from buf at the specified offset.

import { Buffer } from 'node:buffer';

const buf = Buffer.from([1, 2, 3, 4]);

console.log(buf.readFloatLE(0));
// Prints: 1.539989614439558e-36
console.log(buf.readFloatLE(1));
// Throws ERR_OUT_OF_RANGE.

Parameters

Name	Type	Description
`offset?`	`number`	Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 4`.

Returns

number

Since

v0.11.15

Defined in

node_modules/@types/node/buffer.d.ts:1535

readInt16BE

▸ readInt16BE(offset?): number

Reads a signed, big-endian 16-bit integer from buf at the specified offset.

Integers read from a Buffer are interpreted as two's complement signed values.

import { Buffer } from 'node:buffer';

const buf = Buffer.from([0, 5]);

console.log(buf.readInt16BE(0));
// Prints: 5

Parameters

Name	Type	Description
`offset?`	`number`	Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 2`.

Returns

number

Since

v0.5.5

Defined in

node_modules/@types/node/buffer.d.ts:1482

readInt16LE

▸ readInt16LE(offset?): number

Reads a signed, little-endian 16-bit integer from buf at the specifiedoffset.

Integers read from a Buffer are interpreted as two's complement signed values.

import { Buffer } from 'node:buffer';

const buf = Buffer.from([0, 5]);

console.log(buf.readInt16LE(0));
// Prints: 1280
console.log(buf.readInt16LE(1));
// Throws ERR_OUT_OF_RANGE.

Parameters

Name	Type	Description
`offset?`	`number`	Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 2`.

Returns

number

Since

v0.5.5

Defined in

node_modules/@types/node/buffer.d.ts:1465

readInt32BE

▸ readInt32BE(offset?): number

Reads a signed, big-endian 32-bit integer from buf at the specified offset.

Integers read from a Buffer are interpreted as two's complement signed values.

import { Buffer } from 'node:buffer';

const buf = Buffer.from([0, 0, 0, 5]);

console.log(buf.readInt32BE(0));
// Prints: 5

Parameters

Name	Type	Description
`offset?`	`number`	Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 4`.

Returns

number

Since

v0.5.5

Defined in

node_modules/@types/node/buffer.d.ts:1518

readInt32LE

▸ readInt32LE(offset?): number

Reads a signed, little-endian 32-bit integer from buf at the specifiedoffset.

Integers read from a Buffer are interpreted as two's complement signed values.

import { Buffer } from 'node:buffer';

const buf = Buffer.from([0, 0, 0, 5]);

console.log(buf.readInt32LE(0));
// Prints: 83886080
console.log(buf.readInt32LE(1));
// Throws ERR_OUT_OF_RANGE.

Parameters

Name	Type	Description
`offset?`	`number`	Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 4`.

Returns

number

Since

v0.5.5

Defined in

node_modules/@types/node/buffer.d.ts:1501

readInt8

▸ readInt8(offset?): number

Reads a signed 8-bit integer from buf at the specified offset.

Integers read from a Buffer are interpreted as two's complement signed values.

import { Buffer } from 'node:buffer';

const buf = Buffer.from([-1, 5]);

console.log(buf.readInt8(0));
// Prints: -1
console.log(buf.readInt8(1));
// Prints: 5
console.log(buf.readInt8(2));
// Throws ERR_OUT_OF_RANGE.

Parameters

Name	Type	Description
`offset?`	`number`	Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 1`.

Returns

number

Since

v0.5.0

Defined in

node_modules/@types/node/buffer.d.ts:1446

readIntBE

▸ readIntBE(offset, byteLength): number

Reads byteLength number of bytes from buf at the specified offsetand interprets the result as a big-endian, two's complement signed value supporting up to 48 bits of accuracy.

import { Buffer } from 'node:buffer';

const buf = Buffer.from([0x12, 0x34, 0x56, 0x78, 0x90, 0xab]);

console.log(buf.readIntBE(0, 6).toString(16));
// Prints: 1234567890ab
console.log(buf.readIntBE(1, 6).toString(16));
// Throws ERR_OUT_OF_RANGE.
console.log(buf.readIntBE(1, 0).toString(16));
// Throws ERR_OUT_OF_RANGE.

Parameters

Name	Type	Description
`offset`	`number`	Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - byteLength`.
`byteLength`	`number`	Number of bytes to read. Must satisfy `0 < byteLength <= 6`.

Returns

number

Since

v0.11.15

Defined in

node_modules/@types/node/buffer.d.ts:1303

readIntLE

▸ readIntLE(offset, byteLength): number

Reads byteLength number of bytes from buf at the specified offsetand interprets the result as a little-endian, two's complement signed value supporting up to 48 bits of accuracy.

import { Buffer } from 'node:buffer';

const buf = Buffer.from([0x12, 0x34, 0x56, 0x78, 0x90, 0xab]);

console.log(buf.readIntLE(0, 6).toString(16));
// Prints: -546f87a9cbee

Parameters

Name	Type	Description
`offset`	`number`	Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - byteLength`.
`byteLength`	`number`	Number of bytes to read. Must satisfy `0 < byteLength <= 6`.

Returns

number

Since

v0.11.15

Defined in

node_modules/@types/node/buffer.d.ts:1282

readUInt16BE

▸ readUInt16BE(offset?): number

Reads an unsigned, big-endian 16-bit integer from buf at the specifiedoffset.

This function is also available under the readUint16BE alias.

import { Buffer } from 'node:buffer';

const buf = Buffer.from([0x12, 0x34, 0x56]);

console.log(buf.readUInt16BE(0).toString(16));
// Prints: 1234
console.log(buf.readUInt16BE(1).toString(16));
// Prints: 3456

Parameters

Name	Type	Description
`offset?`	`number`	Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 2`.

Returns

number

Since

v0.5.5

Defined in

node_modules/@types/node/buffer.d.ts:1374

readUInt16LE

▸ readUInt16LE(offset?): number

Reads an unsigned, little-endian 16-bit integer from buf at the specifiedoffset.

This function is also available under the readUint16LE alias.

import { Buffer } from 'node:buffer';

const buf = Buffer.from([0x12, 0x34, 0x56]);

console.log(buf.readUInt16LE(0).toString(16));
// Prints: 3412
console.log(buf.readUInt16LE(1).toString(16));
// Prints: 5634
console.log(buf.readUInt16LE(2).toString(16));
// Throws ERR_OUT_OF_RANGE.

Parameters

Name	Type	Description
`offset?`	`number`	Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 2`.

Returns

number

Since

v0.5.5

Defined in

node_modules/@types/node/buffer.d.ts:1350

readUInt32BE

▸ readUInt32BE(offset?): number

Reads an unsigned, big-endian 32-bit integer from buf at the specifiedoffset.

This function is also available under the readUint32BE alias.

import { Buffer } from 'node:buffer';

const buf = Buffer.from([0x12, 0x34, 0x56, 0x78]);

console.log(buf.readUInt32BE(0).toString(16));
// Prints: 12345678

Parameters

Name	Type	Description
`offset?`	`number`	Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 4`.

Returns

number

Since

v0.5.5

Defined in

node_modules/@types/node/buffer.d.ts:1420

readUInt32LE

▸ readUInt32LE(offset?): number

Reads an unsigned, little-endian 32-bit integer from buf at the specifiedoffset.

This function is also available under the readUint32LE alias.

import { Buffer } from 'node:buffer';

const buf = Buffer.from([0x12, 0x34, 0x56, 0x78]);

console.log(buf.readUInt32LE(0).toString(16));
// Prints: 78563412
console.log(buf.readUInt32LE(1).toString(16));
// Throws ERR_OUT_OF_RANGE.

Parameters

Name	Type	Description
`offset?`	`number`	Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 4`.

Returns

number

Since

v0.5.5

Defined in

node_modules/@types/node/buffer.d.ts:1398

readUInt8

▸ readUInt8(offset?): number

Reads an unsigned 8-bit integer from buf at the specified offset.

This function is also available under the readUint8 alias.

import { Buffer } from 'node:buffer';

const buf = Buffer.from([1, -2]);

console.log(buf.readUInt8(0));
// Prints: 1
console.log(buf.readUInt8(1));
// Prints: 254
console.log(buf.readUInt8(2));
// Throws ERR_OUT_OF_RANGE.

Parameters

Name	Type	Description
`offset?`	`number`	Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 1`.

Returns

number

Since

v0.5.0

Defined in

node_modules/@types/node/buffer.d.ts:1324

readUIntBE

▸ readUIntBE(offset, byteLength): number

Reads byteLength number of bytes from buf at the specified offsetand interprets the result as an unsigned big-endian integer supporting up to 48 bits of accuracy.

This function is also available under the readUintBE alias.

import { Buffer } from 'node:buffer';

const buf = Buffer.from([0x12, 0x34, 0x56, 0x78, 0x90, 0xab]);

console.log(buf.readUIntBE(0, 6).toString(16));
// Prints: 1234567890ab
console.log(buf.readUIntBE(1, 6).toString(16));
// Throws ERR_OUT_OF_RANGE.

Parameters

Name	Type	Description
`offset`	`number`	Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - byteLength`.
`byteLength`	`number`	Number of bytes to read. Must satisfy `0 < byteLength <= 6`.

Returns

number

Since

v0.11.15

Defined in

node_modules/@types/node/buffer.d.ts:1260

readUIntLE

▸ readUIntLE(offset, byteLength): number

Reads byteLength number of bytes from buf at the specified offsetand interprets the result as an unsigned, little-endian integer supporting up to 48 bits of accuracy.

This function is also available under the readUintLE alias.

import { Buffer } from 'node:buffer';

const buf = Buffer.from([0x12, 0x34, 0x56, 0x78, 0x90, 0xab]);

console.log(buf.readUIntLE(0, 6).toString(16));
// Prints: ab9078563412

Parameters

Name	Type	Description
`offset`	`number`	Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - byteLength`.
`byteLength`	`number`	Number of bytes to read. Must satisfy `0 < byteLength <= 6`.

Returns

number

Since

v0.11.15

Defined in

node_modules/@types/node/buffer.d.ts:1234

readUint16BE

▸ readUint16BE(offset?): number

Parameters

Name	Type
`offset?`	`number`

Returns

number

Alias

Buffer.readUInt16BE

Since

v14.9.0, v12.19.0

Defined in

node_modules/@types/node/buffer.d.ts:1379

readUint16LE

▸ readUint16LE(offset?): number

Parameters

Name	Type
`offset?`	`number`

Returns

number

Alias

Buffer.readUInt16LE

Since

v14.9.0, v12.19.0

Defined in

node_modules/@types/node/buffer.d.ts:1355

readUint32BE

▸ readUint32BE(offset?): number

Parameters

Name	Type
`offset?`	`number`

Returns

number

Alias

Buffer.readUInt32BE

Since

v14.9.0, v12.19.0

Defined in

node_modules/@types/node/buffer.d.ts:1425

readUint32LE

▸ readUint32LE(offset?): number

Parameters

Name	Type
`offset?`	`number`

Returns

number

Alias

Buffer.readUInt32LE

Since

v14.9.0, v12.19.0

Defined in

node_modules/@types/node/buffer.d.ts:1403

readUint8

▸ readUint8(offset?): number

Parameters

Name	Type
`offset?`	`number`

Returns

number

Alias

Buffer.readUInt8

Since

v14.9.0, v12.19.0

Defined in

node_modules/@types/node/buffer.d.ts:1329

readUintBE

▸ readUintBE(offset, byteLength): number

Parameters

Name	Type
`offset`	`number`
`byteLength`	`number`

Returns

number

Alias

Buffer.readUIntBE

Since

v14.9.0, v12.19.0

Defined in

node_modules/@types/node/buffer.d.ts:1265

readUintLE

▸ readUintLE(offset, byteLength): number

Parameters

Name	Type
`offset`	`number`
`byteLength`	`number`

Returns

number

Alias

Buffer.readUIntLE

Since

v14.9.0, v12.19.0

Defined in

node_modules/@types/node/buffer.d.ts:1239

reduce

▸ reduce(callbackfn): number

Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.

Parameters

Name	Type	Description
`callbackfn`	(`previousValue`: `number`, `currentValue`: `number`, `currentIndex`: `number`, `array`: `Uint8Array`) => `number`	A function that accepts up to four arguments. The reduce method calls the callbackfn function one time for each element in the array.

Returns

number

Inherited from

Uint8Array.reduce

Defined in

node_modules/typescript/lib/lib.es5.d.ts:2291

▸ reduce(callbackfn, initialValue): number

Parameters

Name	Type
`callbackfn`	(`previousValue`: `number`, `currentValue`: `number`, `currentIndex`: `number`, `array`: `Uint8Array`) => `number`
`initialValue`	`number`

Returns

number

Inherited from

Uint8Array.reduce

Defined in

node_modules/typescript/lib/lib.es5.d.ts:2292

▸ reduce<U>(callbackfn, initialValue): U

Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.

Type parameters

Name
`U`

Parameters

Name	Type	Description
`callbackfn`	(`previousValue`: `U`, `currentValue`: `number`, `currentIndex`: `number`, `array`: `Uint8Array`) => `U`	A function that accepts up to four arguments. The reduce method calls the callbackfn function one time for each element in the array.
`initialValue`	`U`	If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.

Returns

U

Inherited from

Uint8Array.reduce

Defined in

node_modules/typescript/lib/lib.es5.d.ts:2304

reduceRight

▸ reduceRight(callbackfn): number

Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.

Parameters

Name	Type	Description
`callbackfn`	(`previousValue`: `number`, `currentValue`: `number`, `currentIndex`: `number`, `array`: `Uint8Array`) => `number`	A function that accepts up to four arguments. The reduceRight method calls the callbackfn function one time for each element in the array.

Returns

number

Inherited from

Uint8Array.reduceRight

Defined in

node_modules/typescript/lib/lib.es5.d.ts:2316

▸ reduceRight(callbackfn, initialValue): number

Parameters

Name	Type
`callbackfn`	(`previousValue`: `number`, `currentValue`: `number`, `currentIndex`: `number`, `array`: `Uint8Array`) => `number`
`initialValue`	`number`

Returns

number

Inherited from

Uint8Array.reduceRight

Defined in

node_modules/typescript/lib/lib.es5.d.ts:2317

▸ reduceRight<U>(callbackfn, initialValue): U

Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.

Type parameters

Name
`U`

Parameters

Name	Type	Description
`callbackfn`	(`previousValue`: `U`, `currentValue`: `number`, `currentIndex`: `number`, `array`: `Uint8Array`) => `U`	A function that accepts up to four arguments. The reduceRight method calls the callbackfn function one time for each element in the array.
`initialValue`	`U`	If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.

Returns

U

Inherited from

Uint8Array.reduceRight

Defined in

node_modules/typescript/lib/lib.es5.d.ts:2329

reverse

▸ reverse(): Buffer

Returns

Buffer

Overrides

Uint8Array.reverse

Defined in

node_modules/@types/node/buffer.d.ts:1583

set

▸ set(array, offset?): void

Sets a value or an array of values.

Parameters

Name	Type	Description
`array`	`ArrayLike`<`number`>	A typed or untyped array of values to set.
`offset?`	`number`	The index in the current array at which the values are to be written.

Returns

void

Inherited from

Uint8Array.set

Defined in

node_modules/typescript/lib/lib.es5.d.ts:2341

slice

▸ slice(start?, end?): Buffer

Returns a new Buffer that references the same memory as the original, but offset and cropped by the start and end indices.

This method is not compatible with the Uint8Array.prototype.slice(), which is a superclass of Buffer. To copy the slice, useUint8Array.prototype.slice().

import { Buffer } from 'node:buffer';

const buf = Buffer.from('buffer');

const copiedBuf = Uint8Array.prototype.slice.call(buf);
copiedBuf[0]++;
console.log(copiedBuf.toString());
// Prints: cuffer

console.log(buf.toString());
// Prints: buffer

// With buf.slice(), the original buffer is modified.
const notReallyCopiedBuf = buf.slice();
notReallyCopiedBuf[0]++;
console.log(notReallyCopiedBuf.toString());
// Prints: cuffer
console.log(buf.toString());
// Also prints: cuffer (!)

Parameters

Name	Type	Description
`start?`	`number`	Where the new `Buffer` will start.
`end?`	`number`	Where the new `Buffer` will end (not inclusive).

Returns

Buffer

Since

v0.3.0

Deprecated

Use subarray instead.

Overrides

Uint8Array.slice

Defined in

node_modules/@types/node/buffer.d.ts:901

some

▸ some(predicate, thisArg?): boolean

Determines whether the specified callback function returns true for any element of an array.

Parameters

Name	Type	Description
`predicate`	(`value`: `number`, `index`: `number`, `array`: `Uint8Array`) => `unknown`	A function that accepts up to three arguments. The some method calls the predicate function for each element in the array until the predicate returns a value which is coercible to the Boolean value true, or until the end of the array.
`thisArg?`	`any`	An object to which the this keyword can refer in the predicate function. If thisArg is omitted, undefined is used as the this value.

Returns

boolean

Inherited from

Uint8Array.some

Defined in

node_modules/typescript/lib/lib.es5.d.ts:2358

sort

▸ sort(compareFn?): Buffer

Sorts an array.

Parameters

Name	Type	Description
`compareFn?`	(`a`: `number`, `b`: `number`) => `number`	Function used to determine the order of the elements. It is expected to return a negative value if first argument is less than second argument, zero if they're equal and a positive value otherwise. If omitted, the elements are sorted in ascending order. `ts [11,2,22,1].sort((a, b) => a - b)`

Returns

Buffer

Inherited from

Uint8Array.sort

Defined in

node_modules/typescript/lib/lib.es5.d.ts:2369

subarray

▸ subarray(start?, end?): Buffer

Returns a new Buffer that references the same memory as the original, but offset and cropped by the start and end indices.

Specifying end greater than buf.length will return the same result as that of end equal to buf.length.

This method is inherited from TypedArray.prototype.subarray().

Modifying the new Buffer slice will modify the memory in the original Bufferbecause the allocated memory of the two objects overlap.

import { Buffer } from 'node:buffer';

// Create a `Buffer` with the ASCII alphabet, take a slice, and modify one byte
// from the original `Buffer`.

const buf1 = Buffer.allocUnsafe(26);

for (let i = 0; i < 26; i++) {
  // 97 is the decimal ASCII value for 'a'.
  buf1[i] = i + 97;
}

const buf2 = buf1.subarray(0, 3);

console.log(buf2.toString('ascii', 0, buf2.length));
// Prints: abc

buf1[0] = 33;

console.log(buf2.toString('ascii', 0, buf2.length));
// Prints: !bc

Specifying negative indexes causes the slice to be generated relative to the end of buf rather than the beginning.

import { Buffer } from 'node:buffer';

const buf = Buffer.from('buffer');

console.log(buf.subarray(-6, -1).toString());
// Prints: buffe
// (Equivalent to buf.subarray(0, 5).)

console.log(buf.subarray(-6, -2).toString());
// Prints: buff
// (Equivalent to buf.subarray(0, 4).)

console.log(buf.subarray(-5, -2).toString());
// Prints: uff
// (Equivalent to buf.subarray(1, 4).)

Parameters

Name	Type	Description
`start?`	`number`	Where the new `Buffer` will start.
`end?`	`number`	Where the new `Buffer` will end (not inclusive).

Returns

Buffer

Since

v3.0.0

Overrides

Uint8Array.subarray

Defined in

node_modules/@types/node/buffer.d.ts:961

swap16

▸ swap16(): Buffer

Interprets buf as an array of unsigned 16-bit integers and swaps the byte order in-place. Throws ERR_INVALID_BUFFER_SIZE if buf.length is not a multiple of 2.

import { Buffer } from 'node:buffer';

const buf1 = Buffer.from([0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8]);

console.log(buf1);
// Prints: <Buffer 01 02 03 04 05 06 07 08>

buf1.swap16();

console.log(buf1);
// Prints: <Buffer 02 01 04 03 06 05 08 07>

const buf2 = Buffer.from([0x1, 0x2, 0x3]);

buf2.swap16();
// Throws ERR_INVALID_BUFFER_SIZE.

One convenient use of buf.swap16() is to perform a fast in-place conversion between UTF-16 little-endian and UTF-16 big-endian:

import { Buffer } from 'node:buffer';

const buf = Buffer.from('This is little-endian UTF-16', 'utf16le');
buf.swap16(); // Convert to big-endian UTF-16 text.

Returns

Buffer

A reference to buf.

Since

v5.10.0

Defined in

node_modules/@types/node/buffer.d.ts:1619

swap32

▸ swap32(): Buffer

Interprets buf as an array of unsigned 32-bit integers and swaps the byte order in-place. Throws ERR_INVALID_BUFFER_SIZE if buf.length is not a multiple of 4.

import { Buffer } from 'node:buffer';

const buf1 = Buffer.from([0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8]);

console.log(buf1);
// Prints: <Buffer 01 02 03 04 05 06 07 08>

buf1.swap32();

console.log(buf1);
// Prints: <Buffer 04 03 02 01 08 07 06 05>

const buf2 = Buffer.from([0x1, 0x2, 0x3]);

buf2.swap32();
// Throws ERR_INVALID_BUFFER_SIZE.

Returns

Buffer

A reference to buf.

Since

v5.10.0

Defined in

node_modules/@types/node/buffer.d.ts:1645

swap64

▸ swap64(): Buffer

Interprets buf as an array of 64-bit numbers and swaps byte order in-place. Throws ERR_INVALID_BUFFER_SIZE if buf.length is not a multiple of 8.

import { Buffer } from 'node:buffer';

const buf1 = Buffer.from([0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8]);

console.log(buf1);
// Prints: <Buffer 01 02 03 04 05 06 07 08>

buf1.swap64();

console.log(buf1);
// Prints: <Buffer 08 07 06 05 04 03 02 01>

const buf2 = Buffer.from([0x1, 0x2, 0x3]);

buf2.swap64();
// Throws ERR_INVALID_BUFFER_SIZE.

Returns

Buffer

A reference to buf.

Since

v6.3.0

Defined in

node_modules/@types/node/buffer.d.ts:1671

toJSON

▸ toJSON(): Object

Returns a JSON representation of buf. JSON.stringify() implicitly calls this function when stringifying a Buffer instance.

Buffer.from() accepts objects in the format returned from this method. In particular, Buffer.from(buf.toJSON()) works like Buffer.from(buf).

import { Buffer } from 'node:buffer';

const buf = Buffer.from([0x1, 0x2, 0x3, 0x4, 0x5]);
const json = JSON.stringify(buf);

console.log(json);
// Prints: {"type":"Buffer","data":[1,2,3,4,5]}

const copy = JSON.parse(json, (key, value) => {
  return value &#x26;&#x26; value.type === 'Buffer' ?
    Buffer.from(value) :
    value;
});

console.log(copy);
// Prints: <Buffer 01 02 03 04 05>

Returns

Object

Name	Type
`data`	`number`[]
`type`	`"Buffer"`

Since

v0.9.2

Defined in

node_modules/@types/node/buffer.d.ts:730

toLocaleString

▸ toLocaleString(): string

Converts a number to a string by using the current locale.

Returns

string

Inherited from

Uint8Array.toLocaleString

Defined in

node_modules/typescript/lib/lib.es5.d.ts:2382

toReversed

▸ toReversed(): Uint8Array

Copies the array and returns the copy with the elements in reverse order.

Returns

Uint8Array

Inherited from

Uint8Array.toReversed

Defined in

node_modules/typescript/lib/lib.es2023.array.d.ts:270

toSorted

▸ toSorted(compareFn?): Uint8Array

Copies and sorts the array.

Parameters

Name	Type	Description
`compareFn?`	(`a`: `number`, `b`: `number`) => `number`	Function used to determine the order of the elements. It is expected to return a negative value if the first argument is less than the second argument, zero if they're equal, and a positive value otherwise. If omitted, the elements are sorted in ascending order. `ts const myNums = Uint8Array.from([11, 2, 22, 1]); myNums.toSorted((a, b) => a - b) // Uint8Array(4) [1, 2, 11, 22]`

Returns

Uint8Array

Inherited from

Uint8Array.toSorted

Defined in

node_modules/typescript/lib/lib.es2023.array.d.ts:282

toString

▸ toString(encoding?, start?, end?): string

Decodes buf to a string according to the specified character encoding inencoding. start and end may be passed to decode only a subset of buf.

If encoding is 'utf8' and a byte sequence in the input is not valid UTF-8, then each invalid byte is replaced with the replacement character U+FFFD.

The maximum length of a string instance (in UTF-16 code units) is available as constants.MAX_STRING_LENGTH.

import { Buffer } from 'node:buffer';

const buf1 = Buffer.allocUnsafe(26);

for (let i = 0; i < 26; i++) {
  // 97 is the decimal ASCII value for 'a'.
  buf1[i] = i + 97;
}

console.log(buf1.toString('utf8'));
// Prints: abcdefghijklmnopqrstuvwxyz
console.log(buf1.toString('utf8', 0, 5));
// Prints: abcde

const buf2 = Buffer.from('tést');

console.log(buf2.toString('hex'));
// Prints: 74c3a97374
console.log(buf2.toString('utf8', 0, 3));
// Prints: té
console.log(buf2.toString(undefined, 0, 3));
// Prints: té

Parameters

Name	Type	Description
`encoding?`	`BufferEncoding`	The character encoding to use.
`start?`	`number`	The byte offset to start decoding at.
`end?`	`number`	The byte offset to stop decoding at (not inclusive).

Returns

string

Since

v0.1.90

Overrides

Uint8Array.toString

Defined in

node_modules/@types/node/buffer.d.ts:702

valueOf

▸ valueOf(): Uint8Array

Returns the primitive value of the specified object.

Returns

Uint8Array

Inherited from

Uint8Array.valueOf

Defined in

node_modules/typescript/lib/lib.es5.d.ts:2390

values

▸ values(): IterableIterator<number>

Creates and returns an iterator for buf values (bytes). This function is called automatically when a Buffer is used in a for..of statement.

import { Buffer } from 'node:buffer';

const buf = Buffer.from('buffer');

for (const value of buf.values()) {
  console.log(value);
}
// Prints:
//   98
//   117
//   102
//   102
//   101
//   114

for (const value of buf) {
  console.log(value);
}
// Prints:
//   98
//   117
//   102
//   102
//   101
//   114

Returns

IterableIterator<number>

Since

v1.1.0

Overrides

Uint8Array.values

Defined in

node_modules/@types/node/buffer.d.ts:2312

with

▸ with(index, value): Uint8Array

Copies the array and inserts the given number at the provided index.

Parameters

Name	Type	Description
`index`	`number`	The index of the value to overwrite. If the index is negative, then it replaces from the end of the array.
`value`	`number`	The value to insert into the copied array.

Returns

Uint8Array

A copy of the original array with the inserted value.

Inherited from

Uint8Array.with

Defined in

node_modules/typescript/lib/lib.es2023.array.d.ts:291

write

▸ write(string, encoding?): number

Writes string to buf at offset according to the character encoding inencoding. The length parameter is the number of bytes to write. If buf did not contain enough space to fit the entire string, only part of string will be written. However, partially encoded characters will not be written.

import { Buffer } from 'node:buffer';

const buf = Buffer.alloc(256);

const len = buf.write('\u00bd + \u00bc = \u00be', 0);

console.log(`${len} bytes: ${buf.toString('utf8', 0, len)}`);
// Prints: 12 bytes: ½ + ¼ = ¾

const buffer = Buffer.alloc(10);

const length = buffer.write('abcd', 8);

console.log(`${length} bytes: ${buffer.toString('utf8', 8, 10)}`);
// Prints: 2 bytes : ab

Parameters

Name	Type	Description
`string`	`string`	String to write to `buf`.
`encoding?`	`BufferEncoding`	The character encoding of `string`.

Returns

number

Number of bytes written.

Since

v0.1.90

Defined in

node_modules/@types/node/buffer.d.ts:661

▸ write(string, offset, encoding?): number

Parameters

Name	Type
`string`	`string`
`offset`	`number`
`encoding?`	`BufferEncoding`

Returns

number

Defined in

node_modules/@types/node/buffer.d.ts:662

▸ write(string, offset, length, encoding?): number

Parameters

Name	Type
`string`	`string`
`offset`	`number`
`length`	`number`
`encoding?`	`BufferEncoding`

Returns

number

Defined in

node_modules/@types/node/buffer.d.ts:663

writeBigInt64BE

▸ writeBigInt64BE(value, offset?): number

Writes value to buf at the specified offset as big-endian.

value is interpreted and written as a two's complement signed integer.

import { Buffer } from 'node:buffer';

const buf = Buffer.allocUnsafe(8);

buf.writeBigInt64BE(0x0102030405060708n, 0);

console.log(buf);
// Prints: <Buffer 01 02 03 04 05 06 07 08>

Parameters

Name	Type	Description
`value`	`bigint`	Number to be written to `buf`.
`offset?`	`number`	Number of bytes to skip before starting to write. Must satisfy: `0 <= offset <= buf.length - 8`.

Returns

number

offset plus the number of bytes written.

Since

v12.0.0, v10.20.0

Defined in

node_modules/@types/node/buffer.d.ts:982

writeBigInt64LE

▸ writeBigInt64LE(value, offset?): number

Writes value to buf at the specified offset as little-endian.

value is interpreted and written as a two's complement signed integer.

import { Buffer } from 'node:buffer';

const buf = Buffer.allocUnsafe(8);

buf.writeBigInt64LE(0x0102030405060708n, 0);

console.log(buf);
// Prints: <Buffer 08 07 06 05 04 03 02 01>

Parameters

Name	Type	Description
`value`	`bigint`	Number to be written to `buf`.
`offset?`	`number`	Number of bytes to skip before starting to write. Must satisfy: `0 <= offset <= buf.length - 8`.

Returns

number

offset plus the number of bytes written.

Since

v12.0.0, v10.20.0

Defined in

node_modules/@types/node/buffer.d.ts:1003

writeBigUInt64BE

▸ writeBigUInt64BE(value, offset?): number

Writes value to buf at the specified offset as big-endian.

This function is also available under the writeBigUint64BE alias.

import { Buffer } from 'node:buffer';

const buf = Buffer.allocUnsafe(8);

buf.writeBigUInt64BE(0xdecafafecacefaden, 0);

console.log(buf);
// Prints: <Buffer de ca fa fe ca ce fa de>

Parameters

Name	Type	Description
`value`	`bigint`	Number to be written to `buf`.
`offset?`	`number`	Number of bytes to skip before starting to write. Must satisfy: `0 <= offset <= buf.length - 8`.

Returns

number

offset plus the number of bytes written.

Since

v12.0.0, v10.20.0

Defined in

node_modules/@types/node/buffer.d.ts:1024

writeBigUInt64LE

▸ writeBigUInt64LE(value, offset?): number

Writes value to buf at the specified offset as little-endian

import { Buffer } from 'node:buffer';

const buf = Buffer.allocUnsafe(8);

buf.writeBigUInt64LE(0xdecafafecacefaden, 0);

console.log(buf);
// Prints: <Buffer de fa ce ca fe fa ca de>

This function is also available under the writeBigUint64LE alias.

Parameters

Name	Type	Description
`value`	`bigint`	Number to be written to `buf`.
`offset?`	`number`	Number of bytes to skip before starting to write. Must satisfy: `0 <= offset <= buf.length - 8`.

Returns

number

offset plus the number of bytes written.

Since

v12.0.0, v10.20.0

Defined in

node_modules/@types/node/buffer.d.ts:1050

writeBigUint64BE

▸ writeBigUint64BE(value, offset?): number

Parameters

Name	Type
`value`	`bigint`
`offset?`	`number`

Returns

number

Alias

Buffer.writeBigUInt64BE

Since

v14.10.0, v12.19.0

Defined in

node_modules/@types/node/buffer.d.ts:1029

writeBigUint64LE

▸ writeBigUint64LE(value, offset?): number

Parameters

Name	Type
`value`	`bigint`
`offset?`	`number`

Returns

number

Alias

Buffer.writeBigUInt64LE

Since

v14.10.0, v12.19.0

Defined in

node_modules/@types/node/buffer.d.ts:1055

writeDoubleBE

▸ writeDoubleBE(value, offset?): number

Writes value to buf at the specified offset as big-endian. The valuemust be a JavaScript number. Behavior is undefined when value is anything other than a JavaScript number.

import { Buffer } from 'node:buffer';

const buf = Buffer.allocUnsafe(8);

buf.writeDoubleBE(123.456, 0);

console.log(buf);
// Prints: <Buffer 40 5e dd 2f 1a 9f be 77>

Parameters

Name	Type	Description
`value`	`number`	Number to be written to `buf`.
`offset?`	`number`	Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 8`.

Returns

number

offset plus the number of bytes written.

Since

v0.11.15

Defined in

node_modules/@types/node/buffer.d.ts:2004

writeDoubleLE

▸ writeDoubleLE(value, offset?): number

Writes value to buf at the specified offset as little-endian. The valuemust be a JavaScript number. Behavior is undefined when value is anything other than a JavaScript number.

import { Buffer } from 'node:buffer';

const buf = Buffer.allocUnsafe(8);

buf.writeDoubleLE(123.456, 0);

console.log(buf);
// Prints: <Buffer 77 be 9f 1a 2f dd 5e 40>

Parameters

Name	Type	Description
`value`	`number`	Number to be written to `buf`.
`offset?`	`number`	Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 8`.

Returns

number

offset plus the number of bytes written.

Since

v0.11.15

Defined in

node_modules/@types/node/buffer.d.ts:1984

writeFloatBE

▸ writeFloatBE(value, offset?): number

Writes value to buf at the specified offset as big-endian. Behavior is undefined when value is anything other than a JavaScript number.

import { Buffer } from 'node:buffer';

const buf = Buffer.allocUnsafe(4);

buf.writeFloatBE(0xcafebabe, 0);

console.log(buf);
// Prints: <Buffer 4f 4a fe bb>

Parameters

Name	Type	Description
`value`	`number`	Number to be written to `buf`.
`offset?`	`number`	Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 4`.

Returns

number

offset plus the number of bytes written.

Since

v0.11.15

Defined in

node_modules/@types/node/buffer.d.ts:1964

writeFloatLE

▸ writeFloatLE(value, offset?): number

Writes value to buf at the specified offset as little-endian. Behavior is undefined when value is anything other than a JavaScript number.

import { Buffer } from 'node:buffer';

const buf = Buffer.allocUnsafe(4);

buf.writeFloatLE(0xcafebabe, 0);

console.log(buf);
// Prints: <Buffer bb fe 4a 4f>

Parameters

Name	Type	Description
`value`	`number`	Number to be written to `buf`.
`offset?`	`number`	Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 4`.

Returns

number

offset plus the number of bytes written.

Since

v0.11.15

Defined in

node_modules/@types/node/buffer.d.ts:1944

writeInt16BE

▸ writeInt16BE(value, offset?): number

Writes value to buf at the specified offset as big-endian. The valuemust be a valid signed 16-bit integer. Behavior is undefined when value is anything other than a signed 16-bit integer.

The value is interpreted and written as a two's complement signed integer.

import { Buffer } from 'node:buffer';

const buf = Buffer.allocUnsafe(2);

buf.writeInt16BE(0x0102, 0);

console.log(buf);
// Prints: <Buffer 01 02>

Parameters

Name	Type	Description
`value`	`number`	Number to be written to `buf`.
`offset?`	`number`	Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 2`.

Returns

number

offset plus the number of bytes written.

Since

v0.5.5

Defined in

node_modules/@types/node/buffer.d.ts:1880

writeInt16LE

▸ writeInt16LE(value, offset?): number

Writes value to buf at the specified offset as little-endian. The valuemust be a valid signed 16-bit integer. Behavior is undefined when value is anything other than a signed 16-bit integer.

The value is interpreted and written as a two's complement signed integer.

import { Buffer } from 'node:buffer';

const buf = Buffer.allocUnsafe(2);

buf.writeInt16LE(0x0304, 0);

console.log(buf);
// Prints: <Buffer 04 03>

Parameters

Name	Type	Description
`value`	`number`	Number to be written to `buf`.
`offset?`	`number`	Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 2`.

Returns

number

offset plus the number of bytes written.

Since

v0.5.5

Defined in

node_modules/@types/node/buffer.d.ts:1858

writeInt32BE

▸ writeInt32BE(value, offset?): number

Writes value to buf at the specified offset as big-endian. The valuemust be a valid signed 32-bit integer. Behavior is undefined when value is anything other than a signed 32-bit integer.

The value is interpreted and written as a two's complement signed integer.

import { Buffer } from 'node:buffer';

const buf = Buffer.allocUnsafe(4);

buf.writeInt32BE(0x01020304, 0);

console.log(buf);
// Prints: <Buffer 01 02 03 04>

Parameters

Name	Type	Description
`value`	`number`	Number to be written to `buf`.
`offset?`	`number`	Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 4`.

Returns

number

offset plus the number of bytes written.

Since

v0.5.5

Defined in

node_modules/@types/node/buffer.d.ts:1924

writeInt32LE

▸ writeInt32LE(value, offset?): number

Writes value to buf at the specified offset as little-endian. The valuemust be a valid signed 32-bit integer. Behavior is undefined when value is anything other than a signed 32-bit integer.

The value is interpreted and written as a two's complement signed integer.

import { Buffer } from 'node:buffer';

const buf = Buffer.allocUnsafe(4);

buf.writeInt32LE(0x05060708, 0);

console.log(buf);
// Prints: <Buffer 08 07 06 05>

Parameters

Name	Type	Description
`value`	`number`	Number to be written to `buf`.
`offset?`	`number`	Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 4`.

Returns

number

offset plus the number of bytes written.

Since

v0.5.5

Defined in

node_modules/@types/node/buffer.d.ts:1902

writeInt8

▸ writeInt8(value, offset?): number

Writes value to buf at the specified offset. value must be a valid signed 8-bit integer. Behavior is undefined when value is anything other than a signed 8-bit integer.

value is interpreted and written as a two's complement signed integer.

import { Buffer } from 'node:buffer';

const buf = Buffer.allocUnsafe(2);

buf.writeInt8(2, 0);
buf.writeInt8(-2, 1);

console.log(buf);
// Prints: <Buffer 02 fe>

Parameters

Name	Type	Description
`value`	`number`	Number to be written to `buf`.
`offset?`	`number`	Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 1`.

Returns

number

offset plus the number of bytes written.

Since

v0.5.0

Defined in

node_modules/@types/node/buffer.d.ts:1836

writeIntBE

▸ writeIntBE(value, offset, byteLength): number

Writes byteLength bytes of value to buf at the specified offsetas big-endian. Supports up to 48 bits of accuracy. Behavior is undefined whenvalue is anything other than a signed integer.

import { Buffer } from 'node:buffer';

const buf = Buffer.allocUnsafe(6);

buf.writeIntBE(0x1234567890ab, 0, 6);

console.log(buf);
// Prints: <Buffer 12 34 56 78 90 ab>

Parameters

Name	Type	Description
`value`	`number`	Number to be written to `buf`.
`offset`	`number`	Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - byteLength`.
`byteLength`	`number`	Number of bytes to write. Must satisfy `0 < byteLength <= 6`.

Returns

number

offset plus the number of bytes written.

Since

v0.11.15

Defined in

node_modules/@types/node/buffer.d.ts:1153

writeIntLE

▸ writeIntLE(value, offset, byteLength): number

Writes byteLength bytes of value to buf at the specified offsetas little-endian. Supports up to 48 bits of accuracy. Behavior is undefined when value is anything other than a signed integer.

import { Buffer } from 'node:buffer';

const buf = Buffer.allocUnsafe(6);

buf.writeIntLE(0x1234567890ab, 0, 6);

console.log(buf);
// Prints: <Buffer ab 90 78 56 34 12>

Parameters

Name	Type	Description
`value`	`number`	Number to be written to `buf`.
`offset`	`number`	Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - byteLength`.
`byteLength`	`number`	Number of bytes to write. Must satisfy `0 < byteLength <= 6`.

Returns

number

offset plus the number of bytes written.

Since

v0.11.15

Defined in

node_modules/@types/node/buffer.d.ts:1132

writeUInt16BE

▸ writeUInt16BE(value, offset?): number

Writes value to buf at the specified offset as big-endian. The valuemust be a valid unsigned 16-bit integer. Behavior is undefined when valueis anything other than an unsigned 16-bit integer.

This function is also available under the writeUint16BE alias.

import { Buffer } from 'node:buffer';

const buf = Buffer.allocUnsafe(4);

buf.writeUInt16BE(0xdead, 0);
buf.writeUInt16BE(0xbeef, 2);

console.log(buf);
// Prints: <Buffer de ad be ef>

Parameters

Name	Type	Description
`value`	`number`	Number to be written to `buf`.
`offset?`	`number`	Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 2`.

Returns

number

offset plus the number of bytes written.

Since

v0.5.5

Defined in

node_modules/@types/node/buffer.d.ts:1753

writeUInt16LE

▸ writeUInt16LE(value, offset?): number

Writes value to buf at the specified offset as little-endian. The valuemust be a valid unsigned 16-bit integer. Behavior is undefined when value is anything other than an unsigned 16-bit integer.

This function is also available under the writeUint16LE alias.

import { Buffer } from 'node:buffer';

const buf = Buffer.allocUnsafe(4);

buf.writeUInt16LE(0xdead, 0);
buf.writeUInt16LE(0xbeef, 2);

console.log(buf);
// Prints: <Buffer ad de ef be>

Parameters

Name	Type	Description
`value`	`number`	Number to be written to `buf`.
`offset?`	`number`	Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 2`.

Returns

number

offset plus the number of bytes written.

Since

v0.5.5

Defined in

node_modules/@types/node/buffer.d.ts:1725

writeUInt32BE

▸ writeUInt32BE(value, offset?): number

Writes value to buf at the specified offset as big-endian. The valuemust be a valid unsigned 32-bit integer. Behavior is undefined when valueis anything other than an unsigned 32-bit integer.

This function is also available under the writeUint32BE alias.

import { Buffer } from 'node:buffer';

const buf = Buffer.allocUnsafe(4);

buf.writeUInt32BE(0xfeedface, 0);

console.log(buf);
// Prints: <Buffer fe ed fa ce>

Parameters

Name	Type	Description
`value`	`number`	Number to be written to `buf`.
`offset?`	`number`	Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 4`.

Returns

number

offset plus the number of bytes written.

Since

v0.5.5

Defined in

node_modules/@types/node/buffer.d.ts:1807

writeUInt32LE

▸ writeUInt32LE(value, offset?): number

Writes value to buf at the specified offset as little-endian. The valuemust be a valid unsigned 32-bit integer. Behavior is undefined when value is anything other than an unsigned 32-bit integer.

This function is also available under the writeUint32LE alias.

import { Buffer } from 'node:buffer';

const buf = Buffer.allocUnsafe(4);

buf.writeUInt32LE(0xfeedface, 0);

console.log(buf);
// Prints: <Buffer ce fa ed fe>

Parameters

Name	Type	Description
`value`	`number`	Number to be written to `buf`.
`offset?`	`number`	Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 4`.

Returns

number

offset plus the number of bytes written.

Since

v0.5.5

Defined in

node_modules/@types/node/buffer.d.ts:1780

writeUInt8

▸ writeUInt8(value, offset?): number

Writes value to buf at the specified offset. value must be a valid unsigned 8-bit integer. Behavior is undefined when value is anything other than an unsigned 8-bit integer.

This function is also available under the writeUint8 alias.

import { Buffer } from 'node:buffer';

const buf = Buffer.allocUnsafe(4);

buf.writeUInt8(0x3, 0);
buf.writeUInt8(0x4, 1);
buf.writeUInt8(0x23, 2);
buf.writeUInt8(0x42, 3);

console.log(buf);
// Prints: <Buffer 03 04 23 42>

Parameters

Name	Type	Description
`value`	`number`	Number to be written to `buf`.
`offset?`	`number`	Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 1`.

Returns

number

offset plus the number of bytes written.

Since

v0.5.0

Defined in

node_modules/@types/node/buffer.d.ts:1697

writeUIntBE

▸ writeUIntBE(value, offset, byteLength): number

Writes byteLength bytes of value to buf at the specified offsetas big-endian. Supports up to 48 bits of accuracy. Behavior is undefined when value is anything other than an unsigned integer.

This function is also available under the writeUintBE alias.

import { Buffer } from 'node:buffer';

const buf = Buffer.allocUnsafe(6);

buf.writeUIntBE(0x1234567890ab, 0, 6);

console.log(buf);
// Prints: <Buffer 12 34 56 78 90 ab>

Parameters

Name	Type	Description
`value`	`number`	Number to be written to `buf`.
`offset`	`number`	Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - byteLength`.
`byteLength`	`number`	Number of bytes to write. Must satisfy `0 < byteLength <= 6`.

Returns

number

offset plus the number of bytes written.

Since

v0.5.5

Defined in

node_modules/@types/node/buffer.d.ts:1106

writeUIntLE

▸ writeUIntLE(value, offset, byteLength): number

Writes byteLength bytes of value to buf at the specified offsetas little-endian. Supports up to 48 bits of accuracy. Behavior is undefined when value is anything other than an unsigned integer.

This function is also available under the writeUintLE alias.

import { Buffer } from 'node:buffer';

const buf = Buffer.allocUnsafe(6);

buf.writeUIntLE(0x1234567890ab, 0, 6);

console.log(buf);
// Prints: <Buffer ab 90 78 56 34 12>

Parameters

Name	Type	Description
`value`	`number`	Number to be written to `buf`.
`offset`	`number`	Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - byteLength`.
`byteLength`	`number`	Number of bytes to write. Must satisfy `0 < byteLength <= 6`.

Returns

number

offset plus the number of bytes written.

Since

v0.5.5

Defined in

node_modules/@types/node/buffer.d.ts:1078

writeUint16BE

▸ writeUint16BE(value, offset?): number

Parameters

Name	Type
`value`	`number`
`offset?`	`number`

Returns

number

Alias

Buffer.writeUInt16BE

Since

v14.9.0, v12.19.0

Defined in

node_modules/@types/node/buffer.d.ts:1758

writeUint16LE

▸ writeUint16LE(value, offset?): number

Parameters

Name	Type
`value`	`number`
`offset?`	`number`

Returns

number

Alias

Buffer.writeUInt16LE

Since

v14.9.0, v12.19.0

Defined in

node_modules/@types/node/buffer.d.ts:1730

writeUint32BE

▸ writeUint32BE(value, offset?): number

Parameters

Name	Type
`value`	`number`
`offset?`	`number`

Returns

number

Alias

Buffer.writeUInt32BE

Since

v14.9.0, v12.19.0

Defined in

node_modules/@types/node/buffer.d.ts:1812

writeUint32LE

▸ writeUint32LE(value, offset?): number

Parameters

Name	Type
`value`	`number`
`offset?`	`number`

Returns

number

Alias

Buffer.writeUInt32LE

Since

v14.9.0, v12.19.0

Defined in

node_modules/@types/node/buffer.d.ts:1785

writeUint8

▸ writeUint8(value, offset?): number

Parameters

Name	Type
`value`	`number`
`offset?`	`number`

Returns

number

Alias

Buffer.writeUInt8

Since

v14.9.0, v12.19.0

Defined in

node_modules/@types/node/buffer.d.ts:1702

writeUintBE

▸ writeUintBE(value, offset, byteLength): number

Parameters

Name	Type
`value`	`number`
`offset`	`number`
`byteLength`	`number`

Returns

number

Alias

Buffer.writeUIntBE

Since

v14.9.0, v12.19.0

Defined in

node_modules/@types/node/buffer.d.ts:1111

writeUintLE

▸ writeUintLE(value, offset, byteLength): number

Parameters

Name	Type
`value`	`number`
`offset`	`number`
`byteLength`	`number`

Returns

number

Alias

Buffer.writeUIntLE

Since

v14.9.0, v12.19.0

Defined in

node_modules/@types/node/buffer.d.ts:1083

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@ralphschuler.logger.Logger.<internal>.Buffer

Interface: Buffer

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BYTES_PER_ELEMENT

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buffer

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