Javascript Timeout Wrapper

timeoutWrapper.js

const DEFAULT_TIMEOUT = 5000;

// rejects a promise if it doesn't finish within given time
const timeout = async (promise, ms = DEFAULT_TIMEOUT) => {
  const rejectAfterTimeout = new Promise((resolve, reject) => setTimeout(reject, ms, 'timed out'))

  return Promise.race([
    promise,
    rejectAfterTimeout,
  ])
}

// example functionality, to be wrapped in a timeout
const doSomething = async () => new Promise(resolve => setTimeout(resolve, 2000, 'OK'))

// wrap function, with timeout
const doSomethingTimeout = timeout(doSomething(), 1000)

doSomethingTimeout
.then(res => console.log(res))
.catch(error => console.error(`ERROR: ${error}`))

// call wrapper directly, with default timeout
timeout(doSomething())
.then(res => console.log(`Default timeout: ${res}`))
.catch(error => console.error(`ERROR with default timeout: ${error}`))