attempt

Import from @varavel/vdl-plugin-sdk/utils/misc.

function attempt<T, E>(func): [null, T] | [E, null];

Attempt to execute a function and return the result or error. Returns a tuple where: - On success: [null, Result] - First element is null, second is the result - On error: [Error, null] - First element is the caught error, second is null

Type Parameters

Type Parameter	Description
T	The type of the result of the function.
E	The type of the error that can be thrown by the function.

Parameters

Parameter	Type	Description
func	() => T	The function to execute.

Returns

[null, T] | [E, null]

A tuple containing either [null, result] or [error, null].

Example

// Successful execution
const [error, result] = attempt(() => 42);
// [null, 42]

// Failed execution
const [error, result] = attempt(() => {
  throw new Error('Something went wrong');
});
// [Error, null]

// With type parameter
const [error, names] = attempt<string[]>(() => ['Alice', 'Bob']);
// [null, ['Alice', 'Bob']]

Note

Important: This function is not suitable for async functions (functions that return a Promise). When passing an async function, it will return [null, Promise<Result>], but won't catch any errors if the Promise is rejected later.

For handling async functions, use the attemptAsync function instead:

const [error, data] = await attemptAsync(async () => {
  const response = await fetch('https://api.example.com/data');
  return response.json();
});