function-timeout

Make a synchronous function have a timeout

This can be useful if you accept external data and want to ensure processing it does not take too long.

The timeout only works in Node.js. When used in a browser, the function will be wrapped, but never time out.

I have a different package to prevent ReDoS for regexes.

Install

npm install function-timeout

Usage

import functionTimeout, {isTimeoutError} from 'function-timeout';

const generateNumbers = count => {
    // Imagine this takes a long time.
};

const generateNumbersWithTimeout = functionTimeout(generateNumbers, {timeout: 100});

try {
    console.log(generateNumbersWithTimeout(500));
} catch (error) {
    if (isTimeoutError(error)) {
        console.error('Timed out');
    } else {
        throw error;
    }
}

API

functionTimeout(function, options?)

Returns a wrapped version of the given function that throws a timeout error if the execution takes longer than the given timeout.

options

Type: object

timeout?

Type: number (integer)

The time in milliseconds to wait before timing out.

Keep in mind that execution time can vary between different hardware and Node.js versions. Set a generous timeout to avoid flakiness.

isTimeoutError(error)

Returns a boolean for whether the given error is a timeout error.

Related

• super-regex - Make a regular expression time out if it takes too long to execute
• p-timeout - Timeout a promise after a certain amount of time