isAsyncFunction

The isAsyncFunction function checks if the provided value is an async function.

Syntax

isAsyncFunction(value: any): value is (...args: any[]) => Promise<any>;

Parameters

Parameter	Type	Description
value	any	Value to be checked

Returns

Type	Description
boolean	True if it is an async function

Examples

isAsyncFunction(async function() {}); // => true
isAsyncFunction(function() {}); // => false

Notes

• Useful for validating functions before using await.

References

• https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/async_function