The **`keys` method** of the #key# Map: The Map object is a collection of key-value pairs #key# object will return the keys of all the map entries. 

# 
#  Syntax

---
```
mapObj.keys()
```
---

##
## Returns

The `keys()` method will return an iterator object. The returned iterator object contains all the keys of the map in the insertion order.

let map = new Map();

map.set("one", 1);
map.set("two", 2);
map.set("three", 3);

let keyIterator = map.keys();

for(let key of keyIterator){
  console.log(key)
}

# 
## Explanation

In the code above: 

* We have created a `Map` object and added some entries to it. 
* Then called the `keys` method to get all the keys of the map objects.

* Then printed the iterator object returned by the `keys` method using the `for...of` loop.

What is Map.keys method in JavaScript?

The keys() method retrieves all keys from a Map object in insertion order, returning an iterator.

What is Map.keys method in JavaScript?

Syntax

Returns

Code

Explanation