Explore JavaScript regular expressions: learn about regex history, create patterns with special characters, parse data, and match passwords/emails, gaining comprehensive text processing skills.

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Regular Expressions, also known as Regex, come in handy in a multitude of text processing scenarios. Regex defines a search pattern using symbols and allows you to find matches within strings. The applications of this span from software engineering to data science and beyond.

In this course, you will begin with an introduction to regex, its history, and various types of regular expressions. 

You will then learn how to create your own regular expressions using various techniques and special characters. In the latter half of the course, you will explore RegExp Objects, how to parse data, turn phrases into an array of strings, and lastly password and email pattern matching.

By the end of this course, you will be a regular expressions expert.

JavaScript Regular Expressions in Detail

Before we get too crazy with the examples, we want to make sure you have a place to test what you learn. You can write a script with the expression and use it, but, if you’re just starting out, that might be harder than simply keeping a website bookmarked.

## `regex101.com`

There are many online regular expression validators, so you’re more than welcome to Google one, but our favorite is [regex101.com](https://regex101.com/). With it, you can simply write your expression, enter some sample text to analyze, and see the results immediately. You can even pick and choose the flavor of RegExp to use (keep reading to understand what we mean by that).

The following image shows the basic UI you’ll be using:





Before we get too crazy with the examples, we want to make sure you have a place to test what you learn. You can write a script with the expression and use it, but, if you’re just starting out, that might be harder than simply keeping a website bookmarked.

# `regex101.com`

There are many online regular expression validators, so you’re more than welcome to Google one, but our favorite is [regex101.com](https://regex101.com/). With it, you can simply write your expression, enter some sample text to analyze, and see the results immediately. You can even pick and choose the flavor of RegExp to use (keep reading to understand what we mean by that).

The following image shows the basic UI you’ll be using:





Familiarize yourself with 'regex101.com,' one of the major regular expression validators available online.


The Beginning of Regular Expressions

The Anatomy of Regular Expressions

The RegExp Object

Thinking in Regular Expressions

Regular Expressions in the Wild

Wrapping Up

Testing the Expressions

`regex101.com`