Open In App

JavaScript Set clear() Method

Improve
Improve
Like Article
Like
Save
Share
Report

The Set clear() method in JavaScript is used for the removal of all the elements from a set and making it empty.

Set clear() Method Syntax

mySet.clear();

Set clear() Method Parameters

This method does not accept any parameters.

Set clear() Method Return Value

Returns an undefined value.

Set clear() Method Examples

Example 1: Emptying set using Set clear() method

Below is an example of the Set.clear() method.

Javascript




// Create a new set using Set() constructor
let myset = new Set();
 
// Append new elements to the
// set using add() method
myset.add(23);
 
// Print the modified set
console.log(myset);
console.log(myset.size);
 
// The clear() method will remove
// all elements from the set
myset.clear();
 
// This will return 0 as there
// are no elements present in the Set
console.log(myset.size);


Output

Set(1) { 23 }
1
0


Explanation

  • In the above example we Initializes a new Set called myset using the Set() constructor.
  • Adds the element 23 to the set using the add() method and prints the set along with its size.
  • Clears the set using the clear() method and prints its size again, which confirms it as 0.

Example 2: Emptying set using Set clear() method

Below is an example of Set.clear() method.

Javascript




// Create a new set using Set() constructor
let myset = new Set();
 
// Append new elements to the
// set using add() method
myset.add("Manchester");
myset.add("London");
myset.add("Leeds");
 
// Print the modified set
console.log(myset);
console.log(myset.size);
 
// The clear() method will remove
// all elements from the set
myset.clear();
 
// This will return 0 as the set is empty
console.log(myset.size);


Output

Set(3) { 'Manchester', 'London', 'Leeds' }
3
0


Explanation

  • In the above example we Initializes a new Set named myset using the Set() constructor.
  • Adds three strings (“Manchester”, “London”, and “Leeds”) to the set using the add() method and prints the set along with its size.
  • Clears the set using the clear() method and prints its size again, confirming it as 0 since the set is empty.

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

Supported Browsers



Last Updated : 05 Mar, 2024
Like Article
Save Article
Previous
Next
Share your thoughts in the comments
Similar Reads