JavaScript Set clear() Method
Last Updated : 12 Jul, 2024
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The Set clear() method in JavaScript is used for the removal of all the elements from a set and making it empty.
Syntax:
mySet.clear();Parameters:
- This method does not accept any parameters.
Return Value:
- Returns an undefined value.
Example 1: Emptying set using Set clear() method
// 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
0Explanation:
- 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
// 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
0Explanation:
- 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.
