Javascript Replace Method Explained 9fCpiUeUt1g - Complete Information & Details

Web Reference: The replace() method does not change the original string. If you replace a value, only the first instance will be replaced. To replace all instances, use a regular expression with the g modifier set. Read more about regular expressions in our: RegExp Tutorial RegExp Reference - replaces all matches Jul 10, 2025 · The replace() method of String values returns a new string with one, some, or all matches of a pattern replaced by a replacement. The pattern can be a string or a RegExp, and the replacement can be a string or a function called for each match. Here is an example of .replace used with a callback function. In this case, it dramatically simplifies the expression and provides even more flexibility, like replacing with correct capitalisation or replacing both cat and cats in one go:

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