JavaScript Set clear() method

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

Syntax

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

JavaScript Set 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 set = new Set();
set.add("jQuery");
set.add("AngularJS");
set.add("Bootstrap");
document.writeln("Size before invoking clear() method: "+ set.size+"<br>");
set.clear();
document.writeln("Size after invoking clear() method: "+set.size);
</script>

Test it Now

Output:

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

Example 2

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

<script>
var set = new Set();
set.add("jQuery");
set.add("AngularJS");
set.add("Bootstrap");
document.writeln("Element present before invoking clear() method: "+ set.has("Bootstrap")+"<br>");
set.clear();
document.writeln("Element present after invoking clear() method: "+set.has("Bootstrap"));
</script>

Test it Now

Output:

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

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