How To Resolve The Syntax Error : Await Is Only Valid In Async Function?

I have written a code to return some data from asynchronous call using promise. While I try to execute I get 'Syntax Error await is only valid in async function' and also I get Can

Solution 1:

await can only be called in a function marked as async. so, you can make an async IIFE and call the httpGet from there.

(asyncfunction(){
    var body = awaithttpGet('link');
    $.response.setBody(body);
})()

Basically when you use one asynchronous operation, you need to make the entire flow asynchronous as well. So the async keyword kindof uses ES6 generator function and makes it return a promise.

You can check this out if you have confusion.

Solution 2:

This is what worked for me.

I initially had:

exports.doSomething = functions.database.ref('/posts/{postId}').onCreate((snapshot, context) => {

    // ... const [response] = await tasksClient.createTask({ parent: queuePath, task });
});

But I added the word async here (before the open parentheses to snapshot) and then the error went away

// here
.onCreate(async (snapshot, context) => {

So now the code is

exports.doSomething = functions.database.ref('/posts/{postId}').onCreate(async (snapshot, context) => {

    // ... const [response] = await tasksClient.createTask({ parent: queuePath, task });
});