JavaScript Regex: The Secret Weapon for String Manipulation

JavaScript Regex

In JavaScript, regular expressions (often shortened to "regex") are powerful tools for pattern matching within strings.


They provide a concise and flexible way to: -

  • Find specific characters or sequences
  • Validate input
  • Extract data
  • Replace text

Following is a cheatsheet for regular expressions in JavaScript: -

⭐ Character Classes

Character class is a way to match any one of a set of characters. It allows you to specify a group of characters that you want to match within a larger pattern.Character Classes

⭐ Matching Regex

Use .test() method of regex to check if a string matches the pattern.Test Method

⭐ Groups

Group together multiple characters or sub-patterns and apply quantifiers and other operators to the entire group. Create a group with ().Groups

⭐ Quantifiers

Quatifier specifies how many times a particular character or group of characters should appear in the input string.Quantifiers

⭐ Anchors

Anchors are used to match a particular position within the input string, rather than a specific character or group of characters.Anchors