unexpected identifier when using await/async in nodejs

Question

I'm getting unexpected identifier when i use async or await in nodejs. I'm on node version 8.5.0. Completely blocked on this. Is there anyway to fix this?

async function methodA(options) {
    rp(options)
        .then(function (body) {            
            serviceClusterData = JSON.parse(body);         
            console.log("Step 2");
            console.log("Getting cluster details from zookeeper");
        })
        .catch(function (err) {
            console.log("Get failed!");

        });
}

await methodA(options);
console.log("Step 3!");

Tried this after first answer :

var serviceClusterData = "";
            console.log("Step 1!");

            ////////////////////

            async function methodA(options) {
                await rp(options)
                    .then(function (body) {
                        serviceClusterData = JSON.parse(body);
                        console.log("Step 2");
                        console.log("Getting cluster details from zookeeper");
                    })
                    .catch(function (err) {
                        console.log("Get failed!");

                    });
            }

            methodA(options);
            console.log("whoops Step 3!");

Still gets out of order :( Step 1 Step 3 Step 2

Possible duplicate of 'await Unexpected identifier' on Node.js 7.5 — Michał Perłakowski
– Michał Perłakowski, Commented Nov 15, 2017 at 20:45

TGrif · Accepted Answer · 2017-09-20 10:42:11Z

5

You can't use await outside of an async function.

async function methodA(options) {
    await rp(options)
        .then(function (body) {            
            serviceClusterData = JSON.parse(body);         
            console.log("Step 2");
            console.log("Getting cluster details from zookeeper");
        })
        .catch(function (err) {
            console.log("Get failed!");

        });
}

methodA(options);
console.log("Step 3!");

answered Sep 20, 2017 at 10:42

TGrif

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7 Comments

user461112 Over a year ago

Hi, I tried this now and updated question. I'm still getting out of order console.log statements. :( @TGrif

TGrif Over a year ago

Yes, this is the expected result order.

user461112 Over a year ago

Is there a way i can block execution of console.log("whoops Step 3!"); until method A completes?

robertklep Over a year ago

@user461112 an async function returns a promise, so you can treat it like one: methodA(options).then(() => console.log('Step 3!'))

user461112 Over a year ago

@robertklep thanks! that works. How would it work when you have two methods - similar methodA and methodB (both with async and await)

|

Devaraj C · Accepted Answer · 2017-09-20 10:50:22Z

0

'use strict'

function methodA(options) {

    return new Promise(resolve => {
        setTimeout(() => {
            console.log(1)
            resolve(true);
        }, 2000);
    })
}

//Sync Declartion
async function test() {
    //Await declaration
    await methodA({});
    console.log(2);
}
test();

It seems there's is some syntax error in your code. Above code works in 8.5.0

Reference https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/async_function

edited Sep 20, 2017 at 10:50

answered Sep 20, 2017 at 10:41

Devaraj C

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