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

Mar 13, 2025 · The toLowerCase() method returns the value of the string converted to lower case. toLowerCase() does not affect the value of the string str itself.

Dec 8, 2022 · 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. So, you can do something like: toLocaleUpperCase () or lower case functions don't behave like they should do.

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

Sep 6, 2024 · The JavaScript toLowerCase() method converts all characters in a string to lowercase, returning a new string without modifying the original. It’s commonly used for case-insensitive comparisons, standardizing text input, or formatting strings by ensuring all characters are in lowercase.

Sep 16, 2021 · The toLowerCase() method converts the string specified into a new one that consists of only lowercase letters and returns that value. It means that the old, original string is not changed or affected in any way.

Feb 12, 2024 · Approach 1: Using the toLowerCase() Method. This approach uses the built-in toLowerCase() method of the string object to convert all characters in the string to lowercase. Example: Here, the toLowerCase() method is called on the originalString variable, which contains the string "Hello World".

The toLowerCase() method raises TypeError when called on null or undefined. The toLowerCase() method does not change the original string.

Feb 6, 2025 · The toLowerCase() method in JavaScript is a fundamental string manipulation tool used to convert all uppercase characters in a string to lowercase. It returns a new string with the converted characters, leaving the original string unchanged.

Oct 17, 2022 · Writing answer.toLowerCase() you make sure that the checked string is completely lowercase before comparing it with the correct answer string "yellow". In this way it doesn't matter if the user writes "YELLOW" or "yELLOW" or "yellow" – it is all converted to lowercase.