cssoptim is a C99 tool that removes unused CSS classes from a stylesheet based on usage in HTML and JavaScript files.

make
make test

./build/cssoptim -o output.css input.css input.html input.js

• -o <file>: Output file path.
• -v: Enable verbose logging.
• [files]: List of input files (.css, .html, .js).

• src/main.c: Entry point. Orchestrates the flow.
• src/args.c: Command-line argument parsing using argparse.
• src/css_proc.c: CSS processing using liblexbor. Parses CSS, filters rules, and serializes output.
• src/html_scan.c:
  • HTML scanning using liblexbor HTML parser.
  • JS scanning using a custom simple lexer.

• css_optimize(css, len, used_classes, count): Main function to filter CSS.
• Uses liblexbor to build an AST, traverses it to find Style rules, checks selectors against used_classes, and removes unused ones.

• scan_html(content, len, list): Parses HTML and extracts class attributes.
• scan_js(content, len, list): Scans JS strings for potential class names.