HYF Code Validator

Opinionated in-browser code validator

Browser extension to validate (simple) webpages. Validating on HTML and CSS syntax errors and code standards.

Main validation code is located in: source/validate.js

Based on: https://github.com/notlmn/browser-extension-template

Setup

1. Clone this repo
2. Go to browser extension settings and load this extension's manifest.json file in the source folder
3. A new debug tools panel should appear where validation results appear of that page

Validation rules

✅ Valid HTML

HtML gets send to https://validator.w3.org/nu/

Checked if there is an <h1>

✅ Descriptive CSS classnames

Finds and validates CSS classnames

TODO

• Add more non-descriptive classnames
• Improve detection using partial match

✅ DRY CSS

Duplicate CSS is found by comparing all CSS code blocks with eachother

❌ Magic numbers

Try to detect use of magic numbers (like margin-left: 23.5%)

❌ Mixing rem and pixels

font-size which are sometimes defined in rem and sometimes in px

❌ Semantic HTML

Maybe find a menu element which is not a <nav>

❌ Unecesarry usage of ids

Classes all the way except when there is no other way

❌ Classnames or ids written with capitals

Detect classnames and ids written with capitals

❌ Out commented HTML or CSS

Try to detect comment which are not informative, but just 'old' code