I was given the task of creating a tutorial defining a Regular Expression. A regular expression (or regex) is a string of text that allows you to create patterns that help match, locate, and manage text. They are also frequently used to validate input. In this tutorial I will be deconstructing and defining each component of a regex that matches or validates a hexadecimal value. In CSS, a color can be specified using a hexadecimal value in the form: #rrggbb. Where rr (red), gg (green) and bb (blue) are hexadecimal values between 00 and ff (same as decimal 0-255). The following is the hexadecimal value regex that I have defined in this tutorial:
/^#?([a-f0-9]{6}|[a-f0-9]{3})$/
The regex components I have described in this tutorial are Anchors, Quantifiers, Character Classes, Grouping and Capturing, and Bracket Expressions. After the making of this tutorial, I have a much better understanding of regular expressions. I hope the tutorial will do the same for you. Here is the link to my gist (https://gist.github.com/jaschmidt22/ea23d286820da559912abaa653a1eb4f)
Throughout the making of this tutorial, I frequently referenced javascript.info, The full stack blog, Regexr.com, MDN Webdocs, and Google.
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