The JavaScript WeakMap set() method is used to add or modify the key-value pairs to the WeakMap object. The key must be unique.
Syntax:
WeakMapObj.set(key,value)
Parameters:
key: It represents the key of the element to be added or modified.
value: It represents the value of the element to be added or modified.
Returns:
Updated WeakMap object.
Example 1:
<!DOCTYPE html>
<html>
<body>
<script>
var hello = new WeakMap();
var obj = {};
hello.set(obj, 'HELLO');
document.writeln(hello.get(obj));
</script>
</body>
</html>
Example 2:
<!DOCTYPE html>
<html>
<body>
<script type="text/javascript">
const testWeakmap = new WeakMap();
const object1 = {};
const object2 = {};
testWeakmap.set(object1, 'w3schools');
testWeakmap.set(object2, 'jai');
document.write(testWeakmap.get(object1));
document.write("</br>");
document.write(testWeakmap.get(object2));
</script>
</body>
</html>