Javascript pattern matching7/19/2023 Using special characters, you can do more than just find a direct match.įor example, if you want to match a character in a string that may or may not appear once or multiple times, you can do this with special characters. How to Use Regular Expression Special CharactersĪ special character in a regular expression is a character with a reserved meaning. One way to solve this could be: function isPattern(userInput) `, 'gi') Ĭonsole.log(str.match(regExpConst)) // Output: Here's a scenario: you want to verify that the telephone number entered by a user on a form matches a format, say, #-#-# (where # represents a number). With regular expressions, you can do things like find and replace text, verify that input data follows the format required, and and other similar things. Regular expressions are patterns that allow you to describe, match, or parse text. Let’s get to it! What Are Regular Expressions? ![]() In this article, you will learn about the fundamentals of regular expressions, regular expression pattern notation, how you can interpret a simple regex pattern, and how to write your own regex pattern. Knowing how to solve problems using regex is helpful to you as a developer and improves your productivity. ![]() ![]() They are key to efficient text processing. Regular expressions (regex) are a useful programming tool.
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