JavaScript Tutorial

The language for programming web pages.

Chapter Quiz Exercises
Course Topics
JS Introduction JS Where To JS Output JS Variables JS Data Types JS Functions JS Objects JS Arrays JS Strings JS If Conditions JS Loops JS Math JS Errors JS Scope JS DOM JS Events JS Promises & Async JS Classes JS JSON JS RegExp

JS RegExp

JavaScript Regular Expressions

A regular expression (RegExp) is a sequence of characters that forms a search pattern. RegExp can be used for text search and text replace operations.

Common Patterns:

  • \d — Digit (0-9)
  • \w — Word character (a-z, A-Z, 0-9, _)
  • \s — Whitespace
  • ^ — Start, $ — End
  • + — One or more, * — Zero or more
  • ? — Optional
  • | — OR

Try It Yourself

Edit the code below and click Run to see the result live.

Source Code
Result
Topics
JS Introduction JS Where To JS Output JS Variables JS Data Types JS Functions JS Objects JS Arrays JS Strings JS If Conditions JS Loops JS Math JS Errors JS Scope JS DOM JS Events JS Promises & Async JS Classes JS JSON JS RegExp