Set.prototype.clear()
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The clear()
method of Set
instances removes all elements from this set.
Try it
const set1 = new Set();
set1.add(1);
set1.add("foo");
console.log(set1.size);
// Expected output: 2
set1.clear();
console.log(set1.size);
// Expected output: 0
Syntax
js
clear()
Parameters
None.
Return value
None (undefined
).
Examples
Using the clear() method
js
const mySet = new Set();
mySet.add(1);
mySet.add("foo");
console.log(mySet.size); // 2
console.log(mySet.has("foo")); // true
mySet.clear();
console.log(mySet.size); // 0
console.log(mySet.has("foo")); // false
Specifications
Specification |
---|
ECMAScript® 2025 Language Specification # sec-set.prototype.clear |
Browser compatibility
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