JavaScript Regular Expressions: The Animated Guide (2025)
Subscribe to Udemy’s top courses
Get this course, plus 12,000+ of our top-rated courses, with Personal Plan. Learn moreJavaScript Regular Expressions: The Animated Guide (2025)
PROJECT - Build A Dynamic Client-Side Input Validation System By Using Modern JavaScript And Regular Expressions (Regex)
Product Brand: Udemy
4.7
Udemy Coupon Code for JavaScript Regular Expressions: The Animated Guide (2025) Course. PROJECT – Build A Dynamic Client-Side Input Validation System By Using Modern JavaScript And Regular Expressions (Regex)
Created by devDigest /> | 2 hours on-demand video course
JavaScript Regular Expressions Course Overview
JavaScript Regular Expressions: The Animated Guide (2025)
Build Your Own Client-Side Validation System? You’ll do it. Animated Explainer Videos To Learn Regular Expression concepts? It’s here!
This is the most interactive course online for mastering Regular Expressions In JavaScript with tips & tricks, visual illustrations, and a lot of animated explainer videos.
When you begin to learn Regular Expressions for the first time, it might seem like a random string of nonsense. While they might look awkward at times, they are very useful. Once you have a solid understanding of regular expressions you will become a much more effective programmer. To fully understand regular expressions you need to learn the basic concepts which you can build upon.
1. So What Is A Regular Expression?
A regular expression, regex or regexp (sometimes called a rational expression) is a way to describe a pattern to work with strings by using special syntax.
By formulating a regular expression you can…
- Search for text in a string,
- Replace a sub-string in a string,
- Extract information from a string.
2. A Little History About Regular Expressions.
Regular Expressions began to emerge as a way to describe regular languages.
In the 1950s, Regular expressions originated when mathematician Stephen Cole Kleene described regular languages by using his mathematical notation called regular sets.
Regular expressions later became an important part of the tool suite that emerged from the Unix operating system—the ed, sed and vi (vim) editors, grep, AWK, among others. But the ways in which regular expressions were implemented were not always so regular. They really began to show up in the programming world during the 1970s.
A variety of programming languages like: C#, C, C++, VB. NET, VB 6, Delphi, Java, Groovy, Perl, PHP, JavaScript, VBScript, Python, Go, Ruby, Tcl, PowerShell, R, and more support Regex very well.
3. Situations Where Regex Can Be Used.
Common applications include data validation, data scraping (especially web scraping), data wrangling, simple parsing, syntax highlighting systems, text or string processing tasks where the data need not be textual, and in search engines such as Google in order to determine an algorithmic match to the query a user is asking.
Now have you ever wondered how you get feedback from an online form informing you that you had entered invalid information?
How did it know you entered invalid information?
The answer is that behind the scenes Regular Expressions is used to validate your input.
Almost every programming language implements regular expressions. JavaScript is one of the programming languages with regular expressions support directly built-in. Since you can also run JavaScript on the server with Node.js, the Regular Expression Concepts In JavaScript is the same as Regular Expressions In Node.js
4. What You Will Learn In This Course
This course aims to introduce you to JavaScript Regular Expressions in a simple way by using annotations, tips & tricks, images, and a lot of animated explainer videos.
Here is exactly what you’re going to learn:
- Difference Between A Character And A String.
- How To Match Simple Specific Characters.
- How To Match Different Characters In A Single Position – Character Sets.
- How To Define A Character Range To Match Different Characters In A Single Position – Character Ranges.
- How To Define A Negated Character Set OR Range.
- How To Match Any Character With A Period Or Dot (Except For A New Line).
- How To Escape (Turn OFF Special Meaning) Reserved Regular Expression Characters By Using The Backslash “\” Character.
- How To Match Any Word Character (Alphanumeric).
- How To Match Any Non-Word Character.
- How To Match Any Digit.
- How To Match Any Non-Digit.
- How To Match A Character Either Zero OR One Time.
- How To Match Either Zero OR More Repetitions Of A Character.
- How To Match Either One OR More Repetitions Of A Character.
- Line Anchors – Assert The Start And The End Of A String.
- How To Specify The Exact Amount Of Repetitions To Match.
- How To Specify The Least (Minimum) Amount Of Repetitions To Match.
- How To Specify The Minimum And Maximum Amount Of Repetitions To Match.
- How To Match Alternate Strings OR Words.
- How To Create Regular Expressions In JavaScript.
- JavaScript Regular Expression Flags.
- JavaScript Regular Expressions Methods.
- Validating A Username By Using Regular Expressions And JavaScript.
- Validating A Password By Using Regular Expressions And JavaScript.
- Validating An Email By Using Regular Expressions And JavaScript.
You will also get some practice using regular expressions, and then you will use all that you’ve learned to build a dynamic Client-Side Form Validation System that uses Regular Expressions And JavaScript to validate the data typed in.
By the end of this course, you will gain valuable information to read and create your own regular expressions.
I learned Regular Expressions years ago by hard trial-and-error. Now you can learn at 5x the speed I did. This is the course that I wish I had when I first got started with Regular Expressions.
Now, I hope to welcome you as a new student in this course! So click that “Enroll” button right now, and join me in this adventure today of learning Regular Expressions in JavaScript!
But if you’re not 100% sure yet, just go ahead and watch the promo video and free lectures to take a look at the course project. I promise you will be amazed 🙂
See you in the course!
What you’ll learn
- Difference Between A Character And A String.
- How A Regex Engine Works Internally In Most Programming Languages.
- How To Match Simple Specific Characters.
- How To Match Different Characters In A Single Position – Character Sets.
- How To Define A Character Range To Match Different Characters In A Single Position – Character Ranges.
- How To Define A Negated Character Set OR Range.
- How To Match Any Character With A Period Or Dot (Except For A New Line).
- How To Escape (Turn OFF Special Meaning) Reserved Regular Expression Characters By Using The Backslash “\” Character.
- How To Match Any Word Character (Alphanumeric).
- How To Match Any Non-Word Character.
- How To Match Any Digit.
- How To Match Any Non-Digit.
- How To Match A Character Either Zero OR One Time.
- How To Match Either Zero OR More Repetitions Of A Character.
- How To Match Either One OR More Repetitions Of A Character.
- Line Anchors – Assert The Start And The End Of A String.
- How To Specify The Exact Amount Of Repetitions To Match.
- How To Specify The Least (Minimum) Amount Of Repetitions To Match.
- How To Specify The Minimum And Maximum Amount Of Repetitions To Match.
- How To Match Alternate Strings OR Words.
- How To Create Regular Expressions In JavaScript.
- JavaScript Regular Expression Flags.
- JavaScript Regular Expressions Methods.
- Validating A Username By Using Regular Expressions And JavaScript.
- Validating A Password By Using Regular Expressions And JavaScript.
- Validating An Email By Using Regular Expressions And JavaScript.
Recommended JavaScript Courses
JavaScript Complete Grandmaster Course 2025
JavaScript – The Complete Guide 2025 (Beginner + Advanced)
JavaScript Regular Expressions Course Reviews
Everything You Need to Know About JavaScript Regular Expressions: The Animated Guide (2025)
This course is a comprehensive and well-structured introduction to JavaScript Regular Expressions: The Animated Guide (2025). The instructor, devDigest is a leading expert in the field with a wealth of experience in Development to share.
The course is well-structured and easy to follow, and the instructor does a great job of explaining complex concepts in a clear and concise way.
The course is divided into sections, each of which covers a different aspect related to Regular Expressions. Each module contains a series of video lectures, readings, and hands-on exercises.
The instructor does a great job of explaining each topic in a clear and concise way. He/She also provides plenty of examples and exercises to help students learn the material.
One of the things I liked most about this course is that it is very practical. The instructor focuses on teaching students the skills and knowledge they need to succeed in the real world. He/She also provides students with access to a variety of resources, including templates, checklists, and cheat sheets.
Another thing I liked about this course is that it is offered on Udemy. Udemy is a great platform for taking online courses because it offers a lot of flexibility for students. Students can choose to take courses at their own pace, and they can access the course materials from anywhere with an internet connection.
Udemy also offers a variety of payment options, so students can find a plan that works for them. The course also has a very active community forum where students can ask questions and interact with each other. The instructor is also very responsive to student questions and feedback.
Overall, I highly recommend this course to anyone who is interested in learning JavaScript Regular Expressions: The Animated Guide (2025). It is a well-organized and informative course that will teach you the skills and knowledge you need to succeed.
