JavaScript Set.size Property

The Set.size property in JavaScript returns the number of elements in a Set. If the Set is empty the size of the set will be returned as 0.

Syntax:

mySet.size

Here are some examples to illustrate the size property of JavaScript Set object:

Example 1:

Javascript

<script>

    // Create a new set using Set() constructor
    let myset = new Set();

    // Append new elements to the
    // set using add() method
    myset.add(23);
    myset.add(12);

    // Print the modified set
    console.log(myset);

    // As the set has 2 elements,
    // it will return 2.
    console.log(myset.size);
</script>

Output:

Set(2) { 23, 12 }
2

Example 2:

Javascript

<script>

    // Creating a new set
    let myset = new Set();

    // Adding new elements to the set
    myset.set('Manchester');
    myset.add('London');
    myset.add('Norwich');

    // As set has 3 elements, it will return 3
    console.log(set.size);
</script>

Output:

3

Supported Browsers:

• Google Chrome:  38+
• Firefox: 19+
• Internet Explorer: 11+
• Opera: 25+
• Edge: 12+
• Safari: 08+