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Kennedy Koss
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Asked: 2022-08-10T17:01:57+00:00 In:

syntaxerror: await is only valid in async function – How to fix?

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I am writing my program, then error syntaxerror: await is only valid in async function shows up.

This is my code in commonFun.js file:

var myfunction = async function(x,y) {

....
return [variableA, variableB]
}
exports.myfunction = myfunction;

After using it in a different file

var helper = require('./commonFun.js');
var start = function(a,b){
....
const result = await helper.myfunction('test','test');
}
exports.start = start;

I got error:

"await is only valid in async function"

Tell me the way to solve this problem, please.

Thanks a lots.

 

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1 Answer

  1. Best Answer
    Expert

    Solution:

    Solution 1.

    The issue refers to start rather than myfunction. Here, you wait for the myfunction to complete before returning a promise that will also be awaited. Point out that you may return the promise that myfunction returned instead of using the async hashtag on the function.

    async function myfunction() {
console.log('Inside of myfunction');
}

function start() {
return myfunction();
}

// Call start
(async() => {
console.log('before start');

await start();

console.log('after start');
})();

    Solution 2.

    This error message actually referred to the map function’s lack of a “async” designation. By removing the “await” call from the map function and finding another way to achieve the desired behavior, the syntaxerror: await is only valid in async function can be fixed.

    var myfunction = async function(x,y) {
....
someArray.map(someVariable => { // <- This was the function giving the error
return await someFunction(someVariable);
});
}
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