Map.set() function in JavaScript

The set() function of Map object adds or updates elements (key-value pairs) to a Map object.

Syntax

Its Syntax is as follows

mapVar.set()

Example

 Live Demo

<html>
<head>
   <title>JavaScript Example</title>
</head>
<body>
   <script type="text/javascript">
      var mapVar = new Map();
      mapVar.set('1', 'Java');
      mapVar.set('2', 'JavaFX');
      mapVar.set('3', 'HBase');
      mapVar.set('4', 'Neo4j');
      document.write(mapVar.has('3'));
   </script>
</body>
</html>

Output

true

Updated on: 25-Jun-2020

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