dynamic async await in node js

Question

trying to build a generic function that calls async functions dynamically.

//passing the controller and functionName (string) 
function asyncAwaitCaller(controller, functionName) {
    let result = await controller[functionName];
}

and in my controller :

async dummyFunction() {
     return "dummy";
}

but I get the following error :

SyntaxError: await is only valid in async function

Is there a way around this, because this works fine with Promises.

you have to declare a function as async if you implement await — Saikat Hajra
– Saikat Hajra, Commented Mar 8, 2018 at 13:56
@AniruddhaGohad, what @Saikat Hajra meant is that asyncAwaitCaller has to be async in order to use await — Eliran Pe'er
– Eliran Pe'er, Commented Mar 8, 2018 at 13:59
The async decorator means "inside this function I am declaring you will find an await and when you do, stop executing and await the response." — msanford
– msanford, Commented Mar 8, 2018 at 14:06

msanford · Accepted Answer · 2018-03-08 14:02:54Z

3

You need to use async here:

async function asyncAwaitCaller(controller, functionName) {
    let result = await controller[functionName];
}

Because you cannot use await if your parent function is not async

edited Mar 8, 2018 at 14:02

msanford

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answered Mar 8, 2018 at 14:00

filipbarak

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