useAwait
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Diagnostic Category: lint/suspicious/useAwait
Since: v1.4.0
Sources:
- Same as:
require-await
- Same as:
@typescript-eslint/require-await
Ensure async
functions utilize await
.
This rule reports async
functions that lack an await
expression. As async
functions return a promise, the use of await
is often necessary to capture the
resolved value and handle the asynchronous operation appropriately. Without await
,
the function operates synchronously and might not leverage the advantages of async
functions.
Examples
Section titled ExamplesInvalid
Section titled Invalidasync function fetchData() {// Missing `await` for the promise returned by `fetch` return fetch('/data');}
code-block.js:1:1 lint/suspicious/useAwait ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
⚠ This async function lacks an await expression.
> 1 │ async function fetchData() {
│ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> 2 │ // Missing await
for the promise returned by fetch
> 3 │ return fetch(‘/data’);
> 4 │ }
│ ^
5 │
ℹ Remove this async modifier, or add an await expression in the function.
> 1 │ async function fetchData() {
│ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> 2 │ // Missing await
for the promise returned by fetch
> 3 │ return fetch(‘/data’);
> 4 │ }
│ ^
5 │
ℹ Async functions without await expressions may not need to be declared async.
Valid
Section titled Validasync function fetchData() { const response = await fetch('/data'); const data = await response.json(); return data;}
// This rule does not warn about non-async functionsfunction processData() { return compute(data);}
// Nor does it warn about empty `async` functionsasync function noop() { }