The clear method of the JavaScript Map object is utilized to eliminate all entries from the Map instance.
Syntax
The syntax for the clear method is as follows:
Example
mapObj.clear()
JavaScript Map clear method example
In this section, we will explore the clear method by examining several examples.
Example 1
Let's see a simple example of clear method.
Example
<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>
Output:
Output
Size before invoking clear(): 3
Size after invoking clear(): 0
Example 2
Let’s examine an example to ascertain if the map object includes the designated element.
Example
<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>
Output:
Output
Element present before invoking clear(): true
Element present after invoking clear(): false
