JavaScript Set entries() Method

The Set.entries() method returns a new Iterator object that contains an array of [value, value] for each element in the Set object, in the order of their insertion. Although a Set does not contain key-value pairs, to keep similarities with the map.entries() method, it will return key-value pairs where both key and value will have the same value.

Syntax:

mySet.entries()

Parameters: This method does not accept any parameters.

Return Value: The entries() method returns a new Iterator object that contains an array of [value, value] for each element in the Set object, in insertion order.

Example 1:

Javascript

let myset = new Set();

// Adding new elements to the set
myset.add("California");
myset.add("Seattle");
myset.add("Chicago");

// Creating an iterator object
const setIterator = myset.entries();

// Getting values with iterator
console.log(setIterator.next().value);
console.log(setIterator.next().value);
console.log(setIterator.next().value);

Output:

[ 'California', 'California' ]
[ 'Seattle', 'Seattle' ]
[ 'Chicago', 'Chicago' ]

Example 2:

Javascript

let myset = new Set();

// adding new elements to the set
myset.add("California");
myset.add("Seattle");
myset.add("Chicago");

// Creating a iterator object
const setIterator = myset.entries();

for (const entry of setIterator) {
    console.log(entry);
}

Output:

[ 'California', 'California' ]
[ 'Seattle', 'Seattle' ]
[ 'Chicago', 'Chicago' ]

Supported Browsers:

• Chrome 38 and above
• Edge 12 and above
• Firefox 24 and above
• Opera 25 and above
• Safari 8 and above

We have a complete list of Javascript Set methods, to check those please go through this Sets in JavaScript article.

We have a Cheat Sheet on Javascript where we covered all the important topics of Javascript to check those please go through Javascript Cheat Sheet-A Basic guide to JavaScript.