JavaScript Map has() method

The JavaScript map has() method is used to indicate whether the map object contains the specified key element.

Syntax:

mapObj.has(key)

Parameters:
key: It represents the specific key which have to be searched.

Return:
Returns true if specified key is present in the map otherwise returns false.

Example:

<!DOCTYPE html>
<html>
<body>
<script>  
var hello=new Map();  
hello.set(1,"GOOD MORNING");
hello.set(2,"GOOD AFTERNOON");
hello.set(3,"GOOD EVENING");  
hello.set(4,"GOOD NIGHT");  
document.writeln(hello.has(4));   
</script>  
</body>
</html>

Output:

true
Please Share