Baseline Widely available
The Set() constructor creates Set objects.
const set1 = new Set([1, 2, 3, 4, 5]);
console.log(set1.has(1));
// Expected output: true
console.log(set1.has(5));
// Expected output: true
console.log(set1.has(6));
// Expected output: false
new Set()
new Set(iterable)
Note: Set() can only be constructed with new. Attempting to call it without new throws a TypeError.
iterable Optional
If an iterable object is passed, all of its elements will be added to the new Set.
If you don't specify this parameter, or its value is null, the new Set is empty.
A new Set object.
Set object
const mySet = new Set();
mySet.add(1); // Set [ 1 ]
mySet.add(5); // Set [ 1, 5 ]
mySet.add(5); // Set [ 1, 5 ]
mySet.add("some text"); // Set [ 1, 5, 'some text' ]
const o = { a: 1, b: 2 };
mySet.add(o);
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