HTML5 website validation

Biome

• GitHub
• Docs
• Language support
  • html support still opt-in
• Rust, much faster than prettier
• Biome is a fast formatter for JavaScript, TypeScript, JSX, TSX, JSON, HTML, CSS and GraphQL that scores 97% compatibility with Prettier
• Integrations
  • biome pre-commit checks
  • Included in super-linter
  • Not included in mega-linter
  • Included in nvim-lint
  • Included in nvim-lspconfig

Install biome:

sudo pacman -S biome

Configuration

• Docs: configuration

Nu Html Checker (vnu)

• Github validator/validator
  • Java
• About Nu Html Checker
• Web service: W3 validator / Nu Html Checker

Install locally

brew install vnu

Other tools

• htmlhint
  • megalinter integration
  • No pre-commit found
• superhtml
  • HTML Validator, Formatter, LSP, and Templating Language Library
  • Zig
  • nvim-lspconfig integration
  • No configuration possible, defaults to 4 space indentation
• tidy-html5
  • Outdated, last release 2021
• html5validator
  • Outdated, last release 2022

Formatters

• prettier

LSPs

• Biome
• superhtml
• htmx-lsp
  • Rust