What is Map.entries method in JavaScript?

The entries method of the Map object will return an iterator object which contains key-value pair for each element of the map object in the insertion order.

Syntax

mapObj.entries();

The entries method returns an iterator object. This object is also iterable, so we can use the for...of loop with the returned iterator.

Code

let map = new Map();
map.set('one', 1);
map.set('two', 2);
map.set('three', 3);
let entries = map.entries();
for(let entry of entries){
  let key = entry[0];
  let val = entry[1];
  console.log(key, val);
}

Explanation

In the code above:

  • We have created a map object and added some entries to the map.

  • Then, we called the entries method on the created map objects.

  • After this, we looped the returned iterator object from the entries method and printed each key-value pair.

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