const-css-minify

Include a minified css file as an inline const in your high-performance compiled web application.

use const_css_minify::minify;

const CSS: &str = minify!("./path/to/style.css");

const_css_minify is not a good solution if your css changes out-of-step with your binary, as you will not be able to change the css without recompiling your application.

const_css_minify will:

• remove unneeded whitespace and linebreaks
• remove comments
• remove unneeded trailing semicolon in each declaration block
• opportunistically minify colors specified either by literal hex values or by rgb(), rgba(), hsl() and hsla() functions (in either legacy syntax with commas or modern syntax without commas) without changing the color. e.g. #ffffff will be substituted with #fff, hsl(180 50 50) with #40bfbf, rgba(20%, 40%, 60%, 0.8) with #369c, etc. const-css-minify will not attempt to calculate nested/complicated/relative rgb expressions (which will be passed through unadulturated for the end user's browser to figure out for itself) but many simple/literal expressions will be resolved and minified.
• silently ignore css syntax errors originating in your source file*, and in so doing possibly elicit slightly different failure modes from renderers by altering the placement of whitespace around misplaced operators

const_css_minify will not:

• compress your css using gz, br or deflate
• change the semantic meaning of your semantically valid css
• make any substitutions other than identical literal colors
• alert you to invalid css* - it's not truly parsing the css, just scanning for and removing characters it identifies as unnecessary

const_css_minify is a lightweight solution - the current version of const_css_minify has zero dependencies outside rust's built-in std and proc_macro libraries.

This project is licensed under the terms of the MIT License.