How to use RegEx in JavaScript for pattern matching?
How to use RegEx in JavaScript for pattern matching?
9331-Oct-2023
Updated on 02-Nov-2023
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How to use RegEx in JavaScript for pattern matching?
Aryan Kumar
02-Nov-2023In JavaScript, you can use regular expressions (regex) for pattern matching using the RegExp object or regular expression literals. Regular expressions allow you to define patterns to search, extract, or manipulate text in strings. Here's how to use regex for pattern matching in JavaScript:
Using the RegExp Object:
You can create a RegExp object to represent a regular expression pattern. Then, you can use its methods like test(), exec(), and others for pattern matching. Here's an example:
Using Regular Expression Literals:
Regular expression literals are defined using forward slashes. You can directly include them in your code without creating a RegExp object. Here's the same example using a regular expression literal:
Using the match() Method:
You can use the match() method to find all matches of a regular expression pattern in a string. This method returns an array of matches or null if no matches are found:
Using the replace() Method:
You can use the replace() method to find and replace text that matches a regular expression pattern in a string:
Regular expressions in JavaScript provide powerful tools for pattern matching, searching, and manipulating text. You can create complex patterns to match various types of content, such as email addresses, URLs, dates, and more.