Web Reference: Regular Expression Search and Replace can be done with different methods. These are the most common: search() is an ECMAScript1 (JavaScript 1997) feature. It is supported in all browsers: Summary: in this tutorial, you’ll learn how to use the JavaScript String search() function to search for a match of a string with a regular expression and return the first match. Jul 10, 2025 · When you want to know whether a pattern is found, and also know its index within a string, use search(). If you only want to know if it exists, use the RegExp.prototype.test() method, which returns a boolean.
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