javascript use await in my function call

Question

Lets say I have a functin like:

function some(){
    console.log("wow")
    return "some"
}

var some_test = await some()
console.log(some_test)

I know it works without await but I want to test await . Here it gives unexpected token error.

Why I am unable to use await here ?

It is an ES7 functionlity. I believe browser doesnot support this functionlity yet. — Narendra CM
– Narendra CM, Commented Feb 4, 2016 at 8:15
More info on await is here jakearchibald.com/2014/es7-async-functions — Narendra CM
– Narendra CM, Commented Feb 4, 2016 at 8:17

David Pine · Accepted Answer · 2016-02-07 14:52:03Z

2

The keywords async and await are available in Node.js applications and not yet supported for client side JavaScript. In order to use these keywords, your Node.js application needs to be using the ES7 standards. Here's a nice introduction to the core concepts. Also, here is the official ECMAScript github repo that documents it.

The calling function must be marked as async and then another async method within that call can then be awaited using the await keyword, just like is done in C#. Examples of the syntax are found here.

async function chainAnimationsAsync(elem, animations) {
        let ret = null;
        try {
            for(const anim of animations) {
                ret = await anim(elem);
            }
        } catch(e) { /* ignore and keep going */ }
        return ret;
    }

answered Feb 7, 2016 at 14:52

David Pine

24.6k11 gold badges82 silver badges113 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

ttt Over a year ago

It won't work on old phones and in Internet Explorer. caniuse.com/#feat=async-functions if your customers don't use either then you should be fine.

coco puffs · Accepted Answer · 2017-03-29 01:07:29Z

1

Async functions are supported in the latest versions of Chrome and FF already, and according to caniuse, in the upcoming Edge 15. The await keyword can only be used inside a function marked with async. A couple of good tutorials on the subject:

Async Function Documentation from Mozilla

Introduction to Async Functions

answered Mar 29, 2017 at 1:07

coco puffs

1,09012 silver badges8 bronze badges

Collectives™ on Stack Overflow

javascript use await in my function call

2 Answers 2

1 Comment

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Related