JavaScript Map delete() Method

JavaScript Map delete() Method with example, javascript map methods, abs() method, round() method, ceil() method, floor() method, pow() method, random() method, sqrt() method, max() method, min() method, log() method, sin() method, cos() method, tan() method etc.

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JavaScript Map delete() method

The JavaScript map delete() method is used to remove all the elements from Map object.

Syntax

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

mapObj.delete()

JavaScript Map delete() method example

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

Example 1

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

<script>
var map=new Map();
map.set(1,"jQuery");
map.set(2,"AngularJS");
map.set(3,"Bootstrap");
document.writeln("Size before invoking delete() method: "+ map.size+"<br>");
map.delete(2);
document.writeln("Size after invoking delete() method: "+map.size);
</script>

Test it Now

Output:

Size before invoking delete() method: 3
Size after invoking delete() method: 2

Example 2

Let's see an example to determine whether the map object contains the specified element.

<script>
var map=new Map();
map.set(1,"jQuery");
map.set(2,"AngularJS");
map.set(3,"Bootstrap");
document.writeln("Element present before invoking delete() method: "+ map.has(2)+"<br>");
map.delete(2);
document.writeln("Element present after invoking delete() method: "+map.has(2));
</script>

Test it Now

Output:

Element present before invoking delete() method: true
Element present after invoking delete() method: false

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