The Set.size property in JavaScript returns the number of elements in a Set. In other words, we can say that this property is used to get the current size of the set. If the Set is empty the size of the set will be returned as 0.
Syntax:
mySet.size
Return Type: Number of elements in the set
Here are some examples to illustrate the size property of the JavaScript Set object:
Example 1: In this example, we will see the use of the Javascript Set.size property.
Javascript
// Create a new set using Set() constructor let myset = new Set(); Â Â // Append new elements to the // set using add() method myset.add(23); myset.add(12); Â Â // Print the modified set console.log(myset); Â Â // As the set has 2 elements, // it will return 2. console.log(myset.size); |
Output:
Set(2) { 23, 12 }
2
Example 2: In this example, we will see the use of the Javascript Set.size property.
Javascript
// Creating a new set let myset = new Set(); Â Â // Adding new elements to the set myset.set('Manchester'); myset.add('London'); myset.add('Norwich'); Â Â // As set has 3 elements, it will return 3 console.log(set.size); |
Output:
3
Supported Browsers:
- Google Chrome
- Firefox
- Opera
- Edge
- Safari
We have a complete list of Javascript Set methods, to check those please go through the Sets in Javascript article.
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