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WeakMap delete() JavaScript

The JavaScript WeakMap delete() method deletes the specified element from a WeakMap object.

Syntax:

weakMapObj.delete(key);

Parameters:
key: It represents the element to be removed from the WeakMap object.

Returns:
It returns if the specified element is removed successfully, otherwise return false.

Example 1:

<!DOCTYPE html>
<html>
<body>
<script>  
var hello = new WeakMap();  
var obj = {};  
hello.set(obj, 'HELLO');  
document.writeln(hello.has(obj)+"<br>");  
hello.delete(obj);  
document.writeln(hello.has(obj));  
</script>
</body>
</html>

Output:

true

Example 2:

<!DOCTYPE html>
<html>
<body>
<script type="text/javascript"> 
const testWeakmap = new WeakMap();
const testObject = {};
 
testWeakmap.set(testObject, 42);
 
document.write(testWeakmap.delete(testObject));
document.write("</br>");
 
document.write(testWeakmap.has(testObject));
 
</script>
</body>
</html>

Output:

true
false
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