Baseline Widely available
The delete()
method of WeakSet
instances removes the specified element from this WeakSet
.
const weakset1 = new WeakSet();
const object1 = {};
weakset1.add(object1);
console.log(weakset1.has(object1));
// Expected output: true
weakset1.delete(object1);
console.log(weakset1.has(object1));
// Expected output: false
Syntax
weakSetInstance.delete(value)
Parameters
value
The value to remove from the WeakSet
object.
true
if an element in the WeakSet
object has been removed successfully. false
if the value
is not found in the WeakSet
. Always returns false
if value
is not an object or a non-registered symbol.
const ws = new WeakSet();
const obj = {};
ws.add(window);
ws.delete(obj); // Returns false. No obj found to be deleted.
ws.delete(window); // Returns true. Successfully removed.
ws.has(window); // Returns false. The window is no longer present in the WeakSet.
Specifications Browser compatibility See also
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