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

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.

Mar 13, 2025 · The toLowerCase () method of String values returns this string converted to lower case.

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.

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.

Feb 12, 2024 · 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".

Returns a new string representing the calling string converted to lowercase. The toLowerCase() method raises TypeError when called on null or undefined. The toLowerCase() method does not change the original string. let str = "Hello World!"; let sentence = …

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 be lowercase. Any lowercase letter, or any character that is not a letter, is not affected.

The simplest way to convert a string to lowercase in JavaScript is to call the toLowerCase() method directly on the string. Here’s an example: const myString = " Hello World " ; const myLowercaseString = myString. toLowerCase (); console. log (myLowercaseString); // …

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.