How to insert a new key-value to Map in JavaScript?

JavaScript – Insert Key-Value Pair in Map

To insert a new key-value pair to a Map in JavaScript, call set() method on this Map and pass the key and value as arguments.

Syntax

The syntax to insert a new key-value pair into a Map map is

map.set(key, value)

Examples

In the following example, we create an empty map, and insert some key-value pairs into it using set() method.

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If the key already exists, then the value is updated with the new value.

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Conclusion

In this JavaScript Tutorial, we learned how to insert a new key-value pair into a Map in JavaScript using set() method, with examples.