What is new Set() in javascript?

In JavaScript, Set is a built-in object that allows you to store unique values of any type, whether primitive values or object references. The Set object was introduced in ECMAScript 2015 (ES6) and provides a simple and efficient way to manage a collection of unique values.

Here's a brief explanation of Set:

Unique Values:
- A Set can only contain unique values. If you try to add a duplicate value, it won't be added, and the set will remain unchanged.
Creation:
- You can create a new Set using the new Set() constructor. You can also initialize a Set with an iterable, such as an array.
```
 const mySet = new Set();
```
or
```
 const mySet = new Set([1, 2, 3, 4, 5]);
```
Adding and Removing Elements:
- You can add an element to a Set using the add method:
```
 mySet.add(6);
```

To remove an element, you can use the delete method:
```
 mySet.delete(3);
```

Checking for Existence:
- You can check if a value exists in a Set using the has method:
```
 console.log(mySet.has(3)); // Returns false after deleting 3
```

Size:

The size property returns the number of elements in a Set:

 console.log(mySet.size); // Returns the number of elements

Iteration:

You can iterate through the elements of a Set using methods like forEach or the for...of loop:

 mySet.forEach(value => {
   console.log(value);
 });

 for (const value of mySet) {
   console.log(value);
 }

Clearing the Set:
- The clear method removes all elements from the Set:
```
 mySet.clear();
```

Set is particularly useful when you need to maintain a collection of unique values without duplicates. It provides a convenient and performant way to handle such scenarios.

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