JavaScript Map clear() Method

JavaScript Map clear() 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 clear() method

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

Syntax

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

mapObj.clear()

JavaScript Map clear() method example

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

Example 1

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

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

Test it Now

Output:

Size before invoking clear(): 3
Size after invoking clear(): 0

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 clear(): "+ map.has(2)+"<br>");
map.clear();
document.writeln("Element present after invoking clear(): "+map.has(2));
</script>

Test it Now

Output:

Element present before invoking clear(): true
Element present after invoking clear(): false

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