JavaScript Intl ListFormat() Constructor

JavaScript Intl Collator() Constructor

Last Updated : 04 Apr, 2023

JavaScript Intl.Collator() constructor is used to create an Intl.Collator object. This constructor can be called with or without the new keyword.

Syntax:

new Intl.Collator(loc, opt)

Parameters: This constructor takes two parameters and both are optional.

loc: This is a String or an array of Strings with the following values allowed:
- co: Specifies the variation collants to be used
- kn: Specifies the numeric collations to be used
- kf: Specifies whether uppercase or lowercase sorting should be used.
opt: It is an object which has some properties like localeMatcher, usage, caseFirst etc.

Returns: An Intl.Collator object.

Below examples illustrate the JavaScript Intl Collator() Constructor:

Example 1: This example implements the basic Collator constructor and uses its compare method

Javascript

console.log(new Intl.Collator().compare('b', 's')); 
console.log(new Intl.Collator().compare(4, 2)); 
console.log(new Intl.Collator().compare(true, true));

Output:

-1
1
0

Example 2: This example performs a modified sorting by using the Intl constructor

Javascript

console.log(['a','A','b','B'] 
       .sort(new Intl.Collator("en", {caseFirst:"upper"}).compare)); 
console.log(['a','A','b','B'] 
        .sort(new Intl.Collator("en", {caseFirst:"lower"}).compare));

Output:

(4) ['A', 'a', 'B', 'b']
(4) ['a', 'A', 'b', 'B']

Supported Browsers:

Chrome
Edge
Firefox
Opera
Safari

We have a complete list of JavaScript Intl methods to check those please go through, the JavaScript Intl Reference article.

JavaScript Intl ListFormat() Constructor

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