Question

110

Get return value from setTimeout

rated 0 times [ 116] [ 6] / answers: 1 / hits: 162879 / 10 Years ago, thu, july 24, 2014, 12:00:00

I just want to get the return value from setTimeout but what I get is a whole text format of the function?

function x () {

    setTimeout(y = function () {

        return 'done';

    }, 1000);

    return y;

}



console.log(x());

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kevenjeffreyr

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4 Years ago

answered 10 Years ago isham · Accepted Answer

You need to use Promises for this. They are available in ES6 but can be polyfilled quite easily:

function x() {

   return new Promise((resolve, reject) => {

     setTimeout(() => {

       resolve('done!');

     });

   });

}



x().then((done) => {

  console.log(done); // --> 'done!'

});

With async/await in ES2017 it becomes nicer if inside an async function:

async function() {

  const result = await x();

  console.log(result); // --> 'done!';

}