isWeakMap

The isWeakMap function checks if the provided value is an instance of WeakMap.

Syntax

isWeakMap(value: any): value is WeakMap<any, any>;

Parameters

Parameter	Type	Description
value	any	Value to be checked

Returns

Type	Description
boolean	True if it is an instance of WeakMap

Examples

isWeakMap(new WeakMap()); // => true
isWeakMap({}); // => false

Notes

• Useful for validating collections before performing WeakMap-specific operations.

References

• https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakMap