JavaScript Regular Expressions
8 lessonsAbout 48 minutesAdvanced
This part of the JavaScript Tutorial runs from JavaScript Regular Expressions through to JavaScript Regex in Practice. There are 8 lessons here, and working through them takes about 48 minutes at a steady pace.
It follows on from JavaScript Dates, so finish that first if you have not already — the examples below assume you are comfortable with it.
Each lesson below says what it covers before you open it. Read them in order the first time; afterwards this page works as a index you can jump back into when you need to check one thing.
- 1JavaScript Regular ExpressionsA regular expression describes a pattern of text rather than exact text.
- 2JavaScript Regex CharactersCharacter classes match a kind of character rather than a specific one.
- 3JavaScript Regex QuantifiersQuantifiers say how many times a pattern should repeat.
- 4JavaScript Regex AnchorsAnchors tie a pattern to the start or end of the text.
- 5JavaScript Regex GroupsGroups capture part of a match so you can use it afterwards.
- 6JavaScript Regex MethodsSeveral string and regex methods work together to search and replace.
- 7JavaScript Regex ValidationRegular expressions are commonly used to check the shape of input.
- 8JavaScript Regex in PracticeA few everyday patterns cover most of what regular expressions are used for.