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ID: typescript-best-practices/promise-await
Language: TypeScript
Severity: Warning
Category: Error Prone
This rule is critical because it ensures promises are properly handled in JavaScript. Promises are objects that represent the eventual completion or failure of an asynchronous operation. Using a promise without await
ing it can lead to unexpected behavior, as the promise might not yet be resolved or rejected at the time it’s used.
To adhere to this rule, always use the await
keyword when using a promise in a condition or loop. This ensures that the promise resolves or rejects before the condition or loop is evaluated.
const foo = Promise.resolve('thing');
if (foo) {
}
const data = foo ? foo : bar;
while (foo) {
}
const foo = Promise.resolve('thing');
if (await foo) {
}
const data = (await foo) ? foo : bar;
while (await foo) {
}
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