Description The toLowerCase() method converts a string to lowercase letters. The toLowerCase() method does not change the original string.

Jul 10, 2025 · The toLowerCase () method of String values returns this string converted to lower case.

Yes, any string in JavaScript has a toLowerCase() method that will return a new string that is the old string in all lowercase. The old string will remain unchanged.

You'll learn how to use the JavaScript toLowerCase () method to return a string with all the characters converted to lowercase.

Jan 16, 2026 · The JavaScript toLowerCase () method Converts all characters of a string to lowercase and returns a new string without changing the original. Used for case-insensitive …

Oct 17, 2022 · The toLowerCase() method is a string method that returns a new string that's completely lowercase. If the original string has uppercase letters, in the new string these will …

Sep 22, 2023 · JavaScript provides two handy methods for converting strings to lowercase: toLowerCase() and toLocaleLowerCase(). These methods make converting strings to …

Jun 26, 2025 · Convert text to lowercase in JavaScript reliably, handling locale, arrays, performance, and common pitfalls with toLowerCase () and Intl methods.

toLowerCase () Return Value Returns a new string representing the calling string converted to lowercase.

Jul 23, 2025 · In JavaScript, converting a string to lowercase means transforming all the characters in the string to their lowercase equivalents. This operation is often used to ensure …