JavaScript – Create an Empty Set

To create an empty Set in JavaScript, create a new set using new Set() and pass no arguments to the constructor. The new Set() creates and returns an empty Set.

Syntax

The syntax to create an empty Set using Set() constructor is

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new Set()

Examples

In the following example, we create an empty set using Set() constructor.

index.html

<!DOCTYPE html>
<html lang="en">
<body>
    <pre id="output"></pre>
    <script>
        //create set from array
        var set1 = new Set();

        var displayOutput = 'Set size : ' + set1.size;
        document.getElementById('output').innerHTML += displayOutput;
    </script>
</body>
</html>

Conclusion

In this JavaScript Tutorial, we learned how to create an empty Set in JavaScript using Set() constructor, with examples.