Error Handling Utility: Simplify Asynchronous Code in JavaScript

[zeroqs]

What is the feature?

This feature provides a utility function for JavaScript that simplifies asynchronous code handling by returning results and errors. Developers can easily manage success and failure cases without writing verbose try...catch blocks.

Example:

const [error, users] = await catchError(fetchUsers());

Why is this feature needed?

This feature introduces a clean, declarative way to manage errors, making the code more concise and easier to maintain.

Any additional comments?

No response

Confirmations

• I have read the Code of Conduct
• I have read the Issue Reporting Guidelines
• I have searched for similar issues in both open and closed tickets and cannot find a duplicate
• I know that any inappropriate content may cause the maintainer to take action base on the Code of Conduct
• This feature request is open because to fix a bug/issue

[xiaodong2008]

Thanks, that's a good idea really.

Btw, I think the code should be

const [error, users] = await catchError(fetchUsers);
// or
const [error, users] = await catchError(() => fetchUsers());

[xiaodong2008]

What do you think of this implementation?

const users = await catchError(fetchUsers);
if (users instanceof Error) {}
else {}
// or
const [users, error] = await catchError(fetchUsers, true);

[zeroqs]

Hi,
I think the approach of

const users = await catchError(fetchUsers);

has some downsides. Specifically, checking for errors by testing if the result is an instance of Error feels less intuitive and introduces unnecessary complexity.

And in other cases, I think everything is fine

Only I didn't understand why true is the second argument :)

[xiaodong2008]

The true means that catchError will return the result as an array: [res, error].

I think that providing both choices will be better.

[xiaodong2008]

Implement this feature in the commit 1993586