Transform all text in a string to lowercase

Use String.toLowerCase() to transform all text in a string to lowercase.

var text = 'This sentence has some MIXED CASE LeTTeRs in it.';

// returns "this sentence has some mixed case letters in it."
var lower = text.toLowerCase();

Source

https://vanillajstoolkit.com/reference/strings/string-tolowercase/