[JS Practice] sort not case sensitive

Title :

sort not case sensitive

Description:

Simple sort, but this time sort regardless of upper / lower case. So the input of

[ "Hello", "there", "I'm", "fine"]

is translated to

["fine", "Hello", "I'm", "there" ]

My solution :

sort = function( arr ) {
    return arr.sort(function(a, b) {
        return a.toLowerCase().localeCompare(b.toLowerCase());
    });
}

Ref. from codewars

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