Last Updated : 12 Jul, 2025
The Intl.ListFormat.supportedLocalesOf() method is an inbuilt method in JavaScript that returns an array containing those of the provided locales that are supported in list formatting.
Syntax:
Intl.ListFormat.supportedLocalesOf(locales, options)
Parameters: This method accepts two parameters as mentioned above and described below:
Return value: This method returns an array of strings representing the subset of the given locale tags that are supported in list formatting.
The below examples illustrate the Intl.ListFormat.supportedLocalesOf() method in JavaScript:
Example 1: In this example, we will see the basic use of the Intl.ListFormat.supportedLocalesOf() method in JavaScript.
javascript
<script>
const geeks = ['ban', 'id-u-co-pinyin', 'de-ID'];
const result = { localeMatcher: 'lookup' };
let val = Intl.ListFormat.supportedLocalesOf(geeks, result).join(', ');
console.log(val);
</script>
Output:
"id-u-co-pinyin, de-ID"
Example 2: In this example, we will see the basic use of the Intl.ListFormat.supportedLocalesOf() method in JavaScript.
javascript
<script>
const geeks = ['ban', 'id-u-co-pinyin', 'de-ID'];
let val = Intl.ListFormat.supportedLocalesOf(geeks).join(', ');
console.log(val);
</script>
Output:
"id-u-co-pinyin, de-ID"
We have a complete list of Javascript Intl methods, to check those please go through the Javascript Intl Complete Reference article.
Supported Browsers: The browsers supported by Intl.ListFormat.supportedLocalesOf() method are listed below:
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HTML:
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