is
rejected after it has already been returned from ` noAwait ` â in some
sense, the promise is unrelated to ` noAwait ` . To improve the stack trace,
you can use ` await ` to unwrap the promise, so that the exception gets thrown
into the current function. The exception will then be immediately wrapped into
a new rejected promise, but during error creation, the caller will appear in
the stack trace.

js

    
    
    async function lastAsyncTask() {
      await null;
      throw new Error("failed");
    }
    
    async function withAwait() {
      return await lastAsyncTask();
    }
    
    withAwait();
    
    // Error: failed
    //    at lastAsyncTask
    //    at async withAwait
    

However, there's a little performance penalty coming with ` return await `
because the promise has to be unwrapped and wrapped again.

##  Specifications

Specification  
---  
[ ECMAScript Language Specification  
#  sec-async-function-definitions
](https://tc39.es/ecma262/multipage/ecmascript-language-functions-and-
classes.html#sec-async-function-definitions)  
  
##  Browser compatibility

BCD tables only load in the browser  with JavaScript enabled. Enable
JavaScript to view data.

##  See also

  * [ ` async function ` ](/en-US/docs/Web/JavaScript/Reference/Statements/async_function)
  * [ ` async function ` expression ](/en-US/docs/Web/JavaScript/Reference/Operators/async_function)
  * [ ` AsyncFunction ` ](/en-US/docs/Web/JavaScript/Reference/Global_Objects/AsyncFunction)
  * [ Top-level await ](https://v8.dev/features/top-level-await) on v8.dev (2019) 

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