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Ascii Table 3

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ascii-table3 is a pure ascii table renderer and beautifier, heavily inspired by the ascii-table package created by Beau Sorensen. The original package lacked support for multiple table styles and that is what motivated me to create this new one.

Currently with over a dozen predefined table styles, the collection style keeps growing. I am pretty sure there is a style for everyone. If not, you can even design your own custom style and add it to the library!

This package now includes support for ANSI escape sequences so that rendered tables can output rich console content with colors by relying on packages like chalk.

Please direct any issues, suggestions or feature requests to the ascii-table3 github page.

Existing code for the original ascii-table package should run fine with very few changes (see examples below).

Usage

Node.js

var { AsciiTable3 } = require('ascii-table3');

Basic usage

Tables are created programmatically.

var { AsciiTable3, AlignmentEnum } = require('ascii-table3');

// create table
var table = 
    new AsciiTable3('Sample table')
    .setHeading('Name', 'Age', 'Eye color')
    .setAlign(3, AlignmentEnum.CENTER)
    .addRowMatrix([
        ['John', 23, 'green'],
        ['Mary', 16, 'brown'],
        ['Rita', 47, 'blue'],
        ['Peter', 8, 'brown']
    ]);

console.log(table.toString());
+-------------------------+
|      Sample table       |
+-------+-----+-----------+
| Name  | Age | Eye color |
+-------+-----+-----------+
| John  |  23 |   green   |
| Mary  |  16 |   brown   |
| Rita  |  47 |   blue    |
| Peter |   8 |   brown   |
+-------+-----+-----------+

We can make simpler tables without a title or headings as well.

var table = 
    new AsciiTable3()
    .setAlignCenter(3)
    .addRowMatrix([
        ['John', 23, 'green'],
        ['Mary', 16, 'brown'],
        ['Rita', 47, 'blue'],
        ['Peter', 8, 'brown']
    ]);

console.log(table.toString());
+-------+----+-------+
| John  | 23 | green |
| Mary  | 16 | brown |
| Rita  | 47 | blue  |
| Peter |  8 | brown |
+-------+----+-------+

Using styles

Tables may be rendered using different styles.

var table = 
    new AsciiTable3('Sample table')
    .setHeading('Name', 'Age', 'Eye color')
    .setAlignCenter(3)
    .addRowMatrix([
        ['John', 23, 'green'],
        ['Mary', 16, 'brown'],
        ['Rita', 47, 'blue'],
        ['Peter', 8, 'brown']
    ]);

// set compact style
table.setStyle('compact');
console.log(table.toString());
-------------------------
 Name    Age   Eye color
------- ----- -----------
 John     23     green
 Mary     16     brown
 Rita     47     blue
 Peter     8     brown

These styles range from simple to more elaborate.

table.setStyle('unicode-single');
console.log(table.toString());
┌─────────────────────────┐
│      Sample table       │
├───────┬─────┬───────────┤
│ Name  │ Age │ Eye color │
├───────┼─────┼───────────┤
│ John  │  23 │   green   │
│ Mary  │  16 │   brown   │
│ Rita  │  47 │   blue    │
│ Peter │   8 │   brown   │
└───────┴─────┴───────────┘

API

Constructor

AsciiTable3([title])

Creates new table object.

  • title - table title (optional)
var { AsciiTable3 } = require('ascii-table3');

var table = new AsciiTable3('Data');

Static Methods

AsciiTable3.isNumeric(val)

Returns wether a val is numeric or not, irrespective of its type.

  • val - value to check
AsciiTable3.isNumeric('test')  // false
AsciiTable3.isNumeric(10)      // true
AsciiTable3.isNumeric(3.14)    // true

AsciiTable3.align(direction, val, len, [pad])

Shortcut to one of the three following methods.

  • direction - alignment direction (AlignmentEnum.LEFT, AlignmentEnum.CENTER, AlignmentEnum.RIGHT, AlignmentEnum.AUTO)
  • val - string to align
  • len - total length of created string
  • pad - padding / fill char (optional, default ' ')

Example:

AsciiTable3.align(AlignmentEnum.LEFT, 'hey', 7) // 'hey    '

AsciiTable3.alignLeft(val, len, [pad])

  • val - string to align
  • len - total length of created string
  • pad - padding / fill char (optional, default ' ')

Example:

AsciiTable3.alignLeft('hey', 7, '-') // 'hey----'

AsciiTable3.alignCenter(val, len, [pad])

  • val - string to align
  • len - total length of created string
  • pad - padding / fill char (optional, default ' ')

Example:

AsciiTable3.alignCenter('hey', 7) // '  hey  '

AsciiTable3.alignRight(val, len, [pad])

  • val - string to align
  • len - total length of created string
  • pad - padding / fill char (optional, default ' ')

Example:

AsciiTable3.alignRight('hey', 7) // '    hey'

AsciiTable3.alignAuto(val, len, [pad])

Attempts to do intelligent alignment of provided val, String input will be left aligned, Number types will be right aligned.

  • val - string to align
  • len - total length of created string
  • pad - padding / fill char (optional, default ' ')

Example:

AsciiTable3.alignAuto('hey', 7) // 'hey    '

AsciiTable3.wordWrap(str, maxWidth)

Wraps a string into multiple lines of a limited width.

  • str - string to wrap
  • maxWidth - maximum width for the wrapped string
AsciiTable3.wordWrap('dummy', 5)           // dummy

AsciiTable3.wordWrap('this is a test', 5)  
// this
// is a
// test

AsciiTable3.wordWrap('this is a test', 3)
// thi
// s
// is
// a
// tes
// t

AsciiTable3.truncateString(str, len)

Truncates a string up to a maximum number of characters (if needed).

  • str - string to truncate
  • len - maximum string lenght

Example:

AsciiTable3.truncateString('bananas', 6)   // 'ban...'
AsciiTable3.truncateString('apples', 10)   // 'apples'

AsciiTable3.arrayFill(len, [val])

Create a new array at the given len, filled with the given value, mainly used internally.

  • len - length of array
  • val - fill value (optional)

Example:

AsciiTable3.arrayFill(4, 0) // [0, 0, 0, 0]
AsciiTable3.arrayFill(2)    // [undefined, undefined]

AsciiTable3.ArrayResize(arr, len, [val])

Increases existing array size up to the desired limit.

  • arr - array to increase size
  • len - new array length
  • val - fill value (optional)
var arr = [ 'a', 'b', 'c' ];

AsciiTable3.arrayResize(arr, 4);    // [ 'a', 'b', 'c', undefined ]

Instance methods

Title

instance.setTitle(title)

Sets the table title.

  • title - table title

Example:

var table = new AsciiTable3('Old Title');

table.setTitle('New Title');

instance.getTitle()

Get the current title of the table.

Example:

table.getTitle() // 'New Title'

instance.setTitleAlign(direction)

Sets up the desired table title alignment.

  • direction - table alignment direction

Example:

// center table title
table.setTitleAlign(AlignmentEnum.CENTER);

instance.setTitleAlignLeft()

Alias to instance.setTitleAlign(AlignmentEnum.LEFT)

instance.setTitleAlignCenter()

Alias to instance.setTitleAlign(AlignmentEnum.CENTER)

instance.setTitleAlignRight()

Alias to instance.setTitleAlign(AlignmentEnum.RIGHT)

instance.getTitleAlign()

Gets the current title alignment type (between AlignmentEnum.LEFT, AlignmentEnum.CENTER and AlignmentEnum.RIGHT).

Example:

table.setTitleAlignLeft();

table.getTitleAlign()      // AlignmentEnum.LEFT

Heading

instance.setHeading(heading, [...])

Set the column headings for the table, takes arguments the same way as addRow.

  • heading - heading array or arguments

Example:

table.setHeading('ID', 'Key', 'Value');

// or:

table.setHeading(['ID', 'Key', 'Value']);

instance.getHeading()

Get the column head for the table as an array.

Example:

table.setHeading('Name', 'Age', 'Height');

table.getHeading()    // [ 'Name', 'Age', 'Height' ]

instance.setHeadingAlign(direction)

  • direction - direction for heading alignment.

Example:

table.setHeadingAlign(AlignmentEnum.LEFT);

instance.setHeadingAlignLeft()

Alias to instance.setHeadingAlignLeft(AlignmentEnum.LEFT)

instance.setHeadingAlignCenter()

Alias to instance.setHeadingAlignLeft(AlignmentEnum.CENTER)

instance.setHeadingAlignRight()

Alias to instance.setHeadingAlignLeft(AlignmentEnum.RIGHT)

instance.getHeadingAlign()

Gets the current heading alignment type (between AlignmentEnum.LEFT, AlignmentEnum.CENTER and AlignmentEnum.RIGHT).

Example:

table.setHeadinglignLeft();

table.getHeadingAlign()      // AlignmentEnum.LEFT

Data rows

instance.addRow(row, [...])

Rows can be added using a single array argument, or the arguments if multiple args are used when calling the method.

  • row - array or arguments of column values

Example:

var table = new AsciiTable3();

table
  .addRow(1, 'Bob', 52)
  .addRow([2, 'John', 34]);

console.log(table.toString());
+---+------+----+
| 1 | Bob  | 52 |
| 2 | John | 34 |
+---+------+----+

instance.addNonZeroRow(row, [...])

Adds new row to table, as long as at least one of the numeric cells' value is not 0 (zero).

  • row - array or arguments of column values

Example:

var table = new AsciiTable3();

table
  .addRow(1, 'Bob', 52)
  .addRow([2, 'John', 34]);

console.log(table.toString());
+---+------+----+
| 1 | Bob  | 52 |
| 2 | John | 34 |
+---+------+----+

If all numeric values are 0 (zero) the new row is not added.

table.addNonZeroRow(0, 'Dummy', 0); // should not be added

console.log(table.toString());
+---+------+----+
| 1 | Bob  | 52 |
| 2 | John | 34 |
+---+------+----+

instance.addRowMatrix(rows)

Bulk addRow operation.

  • rows - multidimensional array of rows

Example:

table.addRowMatrix([
  [2, 'John', 34]
, [3, 'Jim', 83]
]);

console.log(table.toString());
+---+------+----+
| 2 | John | 34 |
| 3 | Jim  | 83 |
+---+------+----+

instance.getRows()

Get the multidimension array of rows from the table.

Example:

table.addRowMatrix([
  [2, 'John', 34]
, [3, 'Jim', 83]
]);

console.log(table.getRows());
[
  [2, 'John', 34]
, [3, 'Jim', 83]
]

Styles

instance.setStyle(name)

Sets the table border style for rendering. Examples are provided below. New border styles are expected to be added as time goes by.

  • name - the style name

Currently available styles are:

  • none - Borderless
      Sample table
 Name    Age   Eye color
 John     23     green
 Mary     16     brown
 Rita     47     blue
 Peter     8     brown
  • compact - Compact
-------------------------
      Sample table
-------------------------
 Name    Age   Eye color
------- ----- -----------
 John     23     green
 Mary     16     brown
 Rita     47     blue
 Peter     8     brown
  • `ramac - beautified 7-bit ASCII output ( the default style)
+-------------------------+
|      Sample table       |
+-------+-----+-----------+
| Name  | Age | Eye color |
+-------+-----+-----------+
| John  |  23 |   green   |
| Mary  |  16 |   brown   |
| Rita  |  47 |   blue    |
| Peter |   8 |   brown   |
+-------+-----+-----------+
  • ascii-table - mimics the original ascii-table npm package table style
.-------------------------.
|      Sample table       |
|-------------------------|
| Name  | Age | Eye color |
|-------------------------|
| John  |  23 |   green   |
| Mary  |  16 |   brown   |
| Rita  |  47 |   blue    |
| Peter |   8 |   brown   |
.-------------------------.

+-------------------------+
|      Sample table       |
+-------+-----+-----------+
| Name  | Age | Eye color |
+=======+=====+===========+
| John  |  23 |   green   |
| Mary  |  16 |   brown   |
| Rita  |  47 |   blue    |
| Peter |   8 |   brown   |
+-------+-----+-----------+

===========================
       Sample table
======== ===== ============
  Name    Age   Eye color
======== ===== ============
  John     23     green
  Mary     16     brown
  Rita     47     blue
  Peter     8     brown
======== ===== ============
  • ascii-dots - Ascii dotted border
...........................
:      Sample table       :
:.........................:
: Name  : Age : Eye color :
:.......:.....:...........:
: John  :  23 :   green   :
: Mary  :  16 :   brown   :
: Rita  :  47 :   blue    :
: Peter :   8 :   brown   :
:.......:.....:...........:
  • ascii-rounded - Ascii rounded-corner border
.-------------------------.
|      Sample table       |
:-------.-----.-----------:
| Name  | Age | Eye color |
:-------+-----+-----------:
| John  |  23 |   green   |
| Mary  |  16 |   brown   |
| Rita  |  47 |   blue    |
| Peter |   8 |   brown   |
'-------'-----'-----------'
  • ascii-clean - Clean(er) ascii table (no left and right borders)
-------------------------
      Sample table
-------|-----|-----------
 Name  | Age | Eye color
-------|-----|-----------
 John  |  23 |   green
 Mary  |  16 |   brown
 Rita  |  47 |   blue
 Peter |   8 |   brown
-------|-----|-----------
  • ascii-girder - Ascii girder-like border
//===========================\\
||       Sample table        ||
|]=======[]=====[]===========[|
|| Name  || Age || Eye color ||
|]=======[]=====[]===========[|
|| John  ||  23 ||   green   ||
|| Mary  ||  16 ||   brown   ||
|| Rita  ||  47 ||   blue    ||
|| Peter ||   8 ||   brown   ||
\\=======[]=====[]===========//
  • unicode-single - Single line unicode chars border
┌─────────────────────────┐
│      Sample table       │
├───────┬─────┬───────────┤
│ Name  │ Age │ Eye color │
├───────┼─────┼───────────┤
│ John  │  23 │   green   │
│ Mary  │  16 │   brown   │
│ Rita  │  47 │   blue    │
│ Peter │   8 │   brown   │
└───────┴─────┴───────────┘
  • unicode-double- Double line unicode chars border
╔═════════════════════════╗
║      Sample table       ║
╠═══════╦═════╦═══════════╣
║ Name  ║ Age ║ Eye color ║
╠═══════╬═════╬═══════════╣
║ John  ║  23 ║   green   ║
║ Mary  ║  16 ║   brown   ║
║ Rita  ║  47 ║   blue    ║
║ Peter ║   8 ║   brown   ║
╚═══════╩═════╩═══════════╝
  • unicode-mix - Mixed single/double line unicode style (single internal border and double external border)
╔═════════════════════════╗
║      Sample table       ║
╟═══════╤═════╤═══════════╢
║ Name  │ Age │ Eye color ║
╟───────┼─────┼───────────╢
║ John  │  23 │   green   ║
║ Mary  │  16 │   brown   ║
║ Rita  │  47 │   blue    ║
║ Peter │   8 │   brown   ║
╚═══════╧═════╧═══════════╝
  • unicode-round - Single line unicode style with rounded edges
╭─────────────────────────╮
│      Sample table       │
├───────┬─────┬───────────┤
│ Name  │ Age │ Eye color │
├───────┼─────┼───────────┤
│ John  │  23 │   green   │
│ Mary  │  16 │   brown   │
│ Rita  │  47 │   blue    │
│ Peter │   8 │   brown   │
╰───────┴─────┴───────────╯
  • github-markdown - github markdown style
|      Sample table       |
| Name  | Age | Eye color |
|-------|-----|-----------|
| John  |  23 |   green   |
| Mary  |  16 |   brown   |
| Rita  |  47 |   blue    |
| Peter |   8 |   brown   |
  • reddit-markdown - reddit markdown style
      Sample table
 Name  | Age | Eye color
-------|-----|-----------
 John  |  23 |   green
 Mary  |  16 |   brown
 Rita  |  47 |   blue
 Peter |   8 |   brown

instance.getStyle()

Retrieves the current border style set for the instance. Style is returned as an object.

Example:

var style = table.getStyle();

console.log (style);
{
        "name": "unicode-double",
        "borders": {
            "top": {
                "left": "╔",
                "center": "═",
                "right": "╗",
                "colSeparator": "╦"
            },
            "middle": {
                "left": "╠",
                "center": "═",
                "right": "╣",
                "colSeparator": "╬"
            },
            "bottom": {
                "left": "╚",
                "center": "═",
                "right": "╝",
                "colSeparator": "╩"
            },
            "data" : {
                "left": "║",
                "center": " ",
                "right": "║",
                "colSeparator": "║"
            }
        }
    }

instance.addStyle(style)

Adds a custom new style to the list of predefined table styles.

  • style - style object to add

Example:

var table = 
    new AsciiTable3('Sample table')
    .setHeading('Name', 'Age', 'Eye color')
    .setAlignCenter(3)
    .addRowMatrix([
        ['John', 23, 'green'],
        ['Mary', 16, 'brown'],
        ['Rita', 47, 'blue'],
        ['Peter', 8, 'brown']
    ]);
    
const roundedStyle = {
  name: "rounded",
  borders: {
    top: {
        left: ".", center: "-", right: ".", colSeparator: "."
    },
    middle: {
        left: ":", center: "-", right: ":", colSeparator: "+"
    },
    bottom: {
        left: "'", center: "-", right: "'", colSeparator: "'"
    },
    data : {
        left: "|", center: " ", right: "|", colSeparator: "|"
    }
  }
};

table.addStyle(roundedStyle);
table.setStyle("rounded");

console.log(table.toString());
.--------------------------------.
|          Sample table          |
:----------.--------.------------:
|   Name   |  Age   | Eye color  |
:----------+--------+------------:
| John     |     23 |   green    |
| Mary     |     16 |   brown    |
| Rita     |     47 |    blue    |
| Peter    |      8 |   brown    |
'----------'--------'------------'

instance.removeBorder()

Shortcut for instance.setStyle('none').

Example:

var table = 
    new AsciiTable3('Sample table')
    .setHeading('Name', 'Age', 'Eye color')
    .setAlignCenter(3)
    .addRowMatrix([
        ['John', 23, 'green'],
        ['Mary', 16, 'brown'],
        ['Rita', 47, 'blue'],
        ['Peter', 8, 'brown']
    ]);
    
  table.removeBorder();
  
  console.log(table);
      Sample table
 Name    Age   Eye color
 John     23     green
 Mary     16     brown
 Rita     47     blue
 Peter     8     brown

instance.setWidth(idx, width)

Sets a preset width for a given column to be used when rendering the table.

  • idx - table column index (starts at 1)
  • width - column width

Example:

var table = 
    new AsciiTable3('Sample table')
    .setHeading('Name', 'Age', 'Eye color')
    .setAlignCenter(3)
    .addRowMatrix([
        ['John', 23, 'green'],
        ['Mary', 16, 'brown'],
        ['Rita', 47, 'blue'],
        ['Peter', 8, 'brown']
    ]);
    
// set the age column width to 5 characters
table.setWidth(1, 10);

console.log(table.toString());
+----------+-----+-----------+
|   Name   | Age | Eye color |
+----------+-----+-----------+
| John     |  23 |   green   |
| Mary     |  16 |   brown   |
| Rita     |  47 |   blue    |
| Peter    |   8 |   brown   |
+----------+-----+-----------+

instance.getWidth(idx)

Get the preset width for a given column when rendering.

  • idx - table column to get width (starts at 1)

Example:

table.setWidth(2, 5);

table.getWidth(2)      // 5
table.getWidth(1)      // undefined (not set)

instance.setWidths(widths)

Sets column widths for table rendering using an array.

  • widths - array of widths

Example:

var table = 
    new AsciiTable3('Sample table')
    .setHeading('Name', 'Age', 'Eye color')
    .addRowMatrix([
        ['John', 23, 'green'],
        ['Mary', 16, 'brown'],
        ['Rita', 47, 'blue'],
        ['Peter', 8, 'brown']
    ]);
    
// set the age column width to 5 characters
table.setWidths([10, 8, 12]);

console.log(table.toString());
+----------+--------+------------+
|   Name   |  Age   | Eye color  |
+----------+--------+------------+
| John     |     23 | green      |
| Mary     |     16 | brown      |
| Rita     |     47 | blue       |
| Peter    |      8 | brown      |
+----------+--------+------------+

instance.getWidths()

Gets the present widths for each column (if any).

Example:

table.setWidths([1, undefined, 3]);

table.getWidths()     // [1, undefined, 3]

instance.setAlign(idx, direction)

  • idx - column index to align (starts at 1)
  • direction - alignment direction, (AlignmentEnum.LEFT, AlignmentEnum.CENTER, AlignmentEnum.RIGHT)

Example:

table
  .setAlign(2, AlignmentEnum.CENTER)
  .setAlign(3, AlignmentEnum.RIGHT);

console.log(table.toString());
+---+-----------+--------------------+
| a |   apple   | Some longer string |
| b |   banana  |                 hi |
| c |   carrot  |               meow |
| e | elephants |                    |
+---+-----------+--------------------+

instance.setAlignLeft(idx)

Alias to instance.setAlign(idx, AlignmentEnum.LEFT)

instance.setAlignCenter(idx)

Alias to instance.setAlign(idx, AlignmentEnum.CENTER)

instance.setAlignRight(idx)

Alias to instance.setAlign(idx, AlignmentEnum.RIGHT)

instance.getAlign(idx)

Get column table alignment.

  • idx - columns to get alignment (starts at 1)

Example:

table.setAlignRight(2);

table.getAlign(2)       // AlignmentEnum.RIGHT

instance.setAligns(directions)

Set column alignment for all columns.

  • direction - Array with alignment directions for each column (AlignmentEnum.LEFT, AlignmentEnum.CENTER, AlignmentEnum.RIGHT).

Example:

// for a 3 column table
table.setAligns([AlignmentEnum.LEFT, AlignmentEnum.CENTER, AlignmentEnum.RIGHT]);

instance.getAligns()

Get array of column alignment for all table instance columns.

Example:

// for a 3 column table
table.setAligns([AlignmentEnum.LEFT, AlignmentEnum.CENTER, AlignmentEnum.RIGHT]);

table.getAligns()  // [AlignmentEnum.LEFT, AlignmentEnum.CENTER, AlignmentEnum.RIGHT]

instance.setWrapped(idx, [wrap])

Sets the wrapping property for a specific column (wrapped content will generate more than one data row if needed).

  • idx - column to wrap (starts at 1).
  • wrap - wrap boolean setting (default is true).
var table = 
    new AsciiTable3('Sample table')
    .setHeading('Name', 'Age', 'Eye color')
    .setAlignCenter(3)
    .addRowMatrix([
        ['James Bond', 41, 'blue'],
        ['Harry Potter', 18, 'brown'],
        ['Scooby Doo', 23, 'brown'],
        ['Mickey Mouse', 120, 'black']
    ]);

// first column width is 8 characters and wrapped
table.setWidth(1, 8).setWrapped(1);

console.log(table.toString());
.------------------------------.
|         Sample table         |
:--------.--------.------------:
|  Name  |  Age   | Eye color  |
:--------+--------+------------:
| James  |     41 |    blue    |
| Bond   |        |            |
| Harry  |     18 |   brown    |
| Potter |        |            |
| Scooby |     23 |   brown    |
| Doo    |        |            |
| Mickey |    120 |   black    |
| Mouse  |        |            |
'--------'--------'------------'

instance.isWrapped(idx)

Gets the wrapping setting for a given column (true or false).

  • idx - column to check (starts at 1)
var table = 
    new AsciiTable3('Sample table')
    .setHeading('Name', 'Age', 'Eye color')
    .setAlignCenter(3)
    .addRowMatrix([
        ['James Bond', 41, 'blue'],
        ['Harry Potter', 18, 'brown'],
        ['Scooby Doo', 23, 'brown'],
        ['Mickey Mouse', 120, 'black']
    ]);

// first column width is 8 characters and wrapped
table.setWidth(1, 8).setWrapped(1);

table.isWrapped(1)     // true
table.isWrapped(2)     // false

instance.setWrappings(wrappings)

Sets the wrapping property for all columns (wrapped content will generate more than one data row if needed).

  • wrappings - array of wrap boolean setting for each columns

Example:

// for a 3 column table
table.setWrappings([true, false, false]);

instance.getWrappings()

Gets the wrapping property for all columns .

Example:

// for a 3 column table
table.setWrappings([true, false, false]);

table.getWrappings()    // [true, false, false]

instance.setCellMargin(margin)

Sets internal margin for cell data (table default is 1).

  • margin - number of empty characters to use for cell margin

Example 1 (no cell margin):

var table = 
    new AsciiTable3('Sample table')
    .setHeading('Name', 'Age', 'Eye color')
    .setAlignCenter(3)
    .addRowMatrix([
        ['John', 23, 'green'],
        ['Mary', 16, 'brown'],
        ['Rita', 47, 'blue'],
        ['Peter', 8, 'brown']
    ]);
    
table.setCellMargin(0);
+-------------------+
|   Sample table    |
+-----+---+---------+
|Name |Age|Eye color|
+-----+---+---------+
|John | 23|  green  |
|Mary | 16|  brown  |
|Rita | 47|  blue   |
|Peter|  8|  brown  |
+-----+---+---------+

Example 2 (cell margin set to 2):

table.setCellMargin(2);
+-------------------------------+
|         Sample table          |
+---------+-------+-------------+
|  Name   |  Age  |  Eye color  |
+---------+-------+-------------+
|  John   |   23  |    green    |
|  Mary   |   16  |    brown    |
|  Rita   |   47  |    blue     |
|  Peter  |    8  |    brown    |
+---------+-------+-------------+

instance.getCellMargin()

Gets the current cell margin for the specified table instance.

Example:

table.setCellMargin(2);

table.getCellMargin()      // 2

instance.setJustify([enabled])

Justify all columns to be the same width.

  • enabled - Boolean for turning justify on or off (default is true).
var table = new AsciiTable3('Dummy title')
            .setHeading('Title', 'Count', 'Rate (%)')
            .addRowMatrix([ 
                ['Dummy 1', 10, 2.3], 
                ['Dummy 2', 5, 3.1],  
                ['Dummy 3', 100, 3.14],
                ['Dummy 4', 0, 1],
             ]);

table.setJustify();

console.log(table.toString());
+--------------------------------+
|          Dummy title           |
+----------+----------+----------+
|  Title   |  Count   | Rate (%) |
+----------+----------+----------+
| Dummy 1  |       10 |      2.3 |
| Dummy 2  |        5 |      3.1 |
| Dummy 3  |      100 |     3.14 |
| Dummy 4  |        0 |        1 |
+----------+----------+----------+

instance.getJustify()

Returns whether all table columns are to be rendered with the same width.

table.setJustify();

table.getJustify()      // true

Clearing data

instance.clear()

Clear / reset all table data

Example:

table.clear();

instance.clearRows()

Resets all row data, maintaining title, headings, widths and style.

table.clearRows();

Sorting

instance.sort(comparefunc)

Sort the table rows according to a specific criteria.

  • comparefunc - compare function to run against the rows

Example:

table.sort(function(a, b) {
  return a[2] - b[2];
});

console.log(table.toString());
+---+------+----+
| 2 | John | 34 |
| 1 | Bob  | 52 |
| 3 | Jim  | 83 |
+---+------+----+

instance.sortColumn(index, [comparefunc])

Sorting shortcut for targeting a specific column.

  • index - column idx to sort
  • comparefunc - sorting compare function to run against column values (optional)

Example:

// This is equivalent to the `sort` example above
table.sortColumn(2);

instance.sortColumnDesc(index)

Descend sorting shortcut for targeting a specific column.

  • index - column idx to sort

Example:

table.sortColumnDesc(1);

// This is equivalent to the `sort` example above
console.log(table.toString());
+---+------+----+
| 1 | Bob  | 52 |
| 2 | John | 34 |
| 3 | Jim  | 83 |
+---+------+----+

Transposing

instance.transpose()

Transposes table by exchanging rows for columns.

Example:

const table = 
    new AsciiTable3('Sample table')
    .setHeading('Name', 'Age', 'Eye color')
    .addRowMatrix([
        ['John', 23, 'green'],
        ['Mary', 16, 'brown'],
        ['Rita', 47, 'blue'],
        ['Peter', 8, 'brown']
    ]);
    
console.log(table.toString());
+-------------------------+
|      Sample table       |
+-------+-----+-----------+
| Name  | Age | Eye color |
+-------+-----+-----------+
| John  |  23 | green     |
| Mary  |  16 | brown     |
| Rita  |  47 | blue      |
| Peter |   8 | brown     |
+-------+-----+-----------+

// transpose table
table.transpose();

console.log(table.toString());
+------------------------------------------+
|               Sample table               |
+-----------+-------+-------+------+-------+
| Name      | John  | Mary  | Rita | Peter |
| Age       |    23 |    16 |   47 |     8 |
| Eye color | green | brown | blue | brown |
+-----------+-------+-------+------+-------+

Serialization

instance.toJSON()

Return the JSON representation of the table, this also allows us to call JSON.stringify on the instance.

Example:

var table = new AsciiTable3('Title');

table
  .setHeading('id', 'name')
  .addRow(1, 'Bob')
  .addRow(2, 'Steve')
  .setWidths([3, 10]);

console.log(table.toJSON());
{
   "title": "Title",
   "heading": ["id","name"],
   "rows": [[1,"Bob"],[2,"Steve"]],
   "formatting": {
       "titleAlign": 2,
       "headingAlign": 2,
       "columns": {
           "aligns": [3,3],
           "widths": [3,10],
           "wrappings": [false,false]
       },
       "justify": false
   }
}

instance.fromJSON(obj)

Populate the table from JSON object, should match the toJSON output above.

  • obj - json object

Example:

var table = new AsciiTable3()
.fromJSON({
   "title": "Title",
   "heading": ["id","name"],
   "rows": [[1,"Bob"],[2,"Steve"]],
   "formatting": {
       "titleAlign": 2,
       "headingAlign": 2,
       "columns": {
           "aligns": [3,3],
           "widths": [3,10],
           "wrappings": [false,false]
       },
       "justify": false
   }
});

Rendering

instance.toString()

Renders the instance as a string for output.

Example:

// create table
var table = 
    new AsciiTable3('Sample table')
    .setHeading('Name', 'Age', 'Eye color')
    .setAlignCenter(3)
    .addRowMatrix([
        ['John', 23, 'green'],
        ['Mary', 16, 'brown'],
        ['Rita', 47, 'blue'],
        ['Peter', 8, 'brown']
    ]);
    
console.log(table.toString());
+-------------------------+
|      Sample table       |
+-------+-----+-----------+
| Name  | Age | Eye color |
+-------+-----+-----------+
| John  |  23 |   green   |
| Mary  |  16 |   brown   |
| Rita  |  47 |   blue    |
| Peter |   8 |   brown   |
+-------+-----+-----------+

Install

With npm:

npm install ascii-table3

About

Beautiful ASCII table renderer

Topics

console ascii table renderer

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Readme

License

Apache-2.0 license
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0.9.0 Latest
Oct 15, 2023
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