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JavaScript WeakMap get() method

The JavaScript WeakMap get() method returns the value of specified key of an element from a WeakMap object.

Syntax

The get() method is represented by the following syntax:

Parameter

key - The key to be searched.

Return

The value of the specified key.

JavaScript WeakMap get() method example

Here, we will understand get() method through various examples.

Example 1

Let's see a simple example of get() method.

<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(wm.get(obj1)+"<br>");
document.writeln(wm.get(obj2)+"<br>");
document.writeln(wm.get(obj3));
</script>

Output:

jQuery
AngularJS
Bootstrap

Example 2

Let's see an example to determine the result when WeakMap object doesn?t contain the key.

<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(wm.get());//returns undefined
</script>

Output:

undefined

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