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Beginner → Intermediate

Regular Expressions in JavaScript

The complete regular expression language for JavaScript in one sitting, taught so that lookahead, backreferences and greediness stop being things you copy from Stack Overflow.

3 Hours1 LessonsBeginner → Intermediate

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regular-expressions-in-javascript

project-based

build · ship · explain

Curriculum

A complete, practical progression.

Work through 1 lessons across a structured 3 hour course designed around practical application.

01

The whole language

Every part of the JavaScript regex syntax, and how they compose.

  • 1.1Reading and writing patterns1h 30m

What students will learn

  • Read and write a pattern without a cheat sheet
  • Choose greedy and lazy quantifiers deliberately
  • Use capture groups, named groups and lookaround
  • Debug a pattern that matches too much or too little

Technologies and skills covered

RegexJavaScriptTextValidation

Course requirements

  • Comfortable with JavaScript strings
  • Basic familiarity with functions

Projects

Course projects and outcomes.

Complete focused builds that connect individual lessons into demonstrable development workflows.

Build 01

Log Line Parser

Extract timestamp, level, service and message from log lines, including the malformed ones.

Build 02

Input Validator

Write a validator that accepts exactly the formats you intend and explains what it rejected.

Who this course is for

Developers who keep copying regex from Stack Overflow
Anyone who has to validate or parse text reliably

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Questions about billing, access or course fit go to support@devtoolchain.store and are answered directly.

Course FAQ

Common questions

Yes. The Full-Stack Web Development Bootcamp and the Web Development Freelancing course both start from absolute first principles and assume no prior coding experience. The AI-Powered Web Development course is written for developers who already ship code, and states its prerequisites on the course page before you buy.

All questions

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The complete regular expression language for JavaScript in one sitting, taught so that lookahead, backreferences and greediness stop being things you copy from Stack Overflow.