The delete method of a JavaScript WeakMap is utilized to eliminate a particular element from a WeakMap instance.
Syntax
The syntax for the delete method is expressed as follows:
Example
WeakMapObj.delete()
JavaScript WeakMap delete method example
Let’s examine an example to ascertain if the WeakMap object includes the specified element.
Example
<script>
var wm = new WeakMap();
var obj1 = {};
var obj2 = {};
var obj3= {};
wm.set(obj1, 'jQuery');
wm.set(obj2, 'AngularJS');
wm.set(obj3,'Bootstrap');
document.writeln("Element present before invoking delete() method: "+ wm.has(obj1)+"<br>");
wm.delete(obj1);
document.writeln("Element present after invoking delete() method: "+wm.has(obj1));
</script>
Output:
Output
Element present before invoking delete() method: true
Element present after invoking delete() method: false
