Free-Style is designed to make CSS easier and more maintainable by using JavaScript.
npm install free-style --saveThere's a great presentation by Christopher Chedeau you should check out.
.button? Why is it conflicting?)<script />).class-name in your styles)ul > li > a){ '&:hover': { ... } })@-rule styles ({ '@media (min-width: 500px)': { ... } }){ backgroundColor: ['red', 'linear-gradient(to right, red 0%, blue 100%)'] })Free-Style generates a hash from the style to use as the class name. This allows duplicate styles to automatically be merged on duplicate hashes. Every style is "registered" and assigned to a variable, which gets the most out of linters that will warn on unused variables and features like dead code minification. Styles should usually be created outside of the application run loop (e.g. render()) so the CSS string and hashes are only generated once.
typestyle - Popular type-safe interface for working with CSSreact-free-style - React implementation that renders styles on the current page (for universal apps)stylin - Simplest abstraction for creating styles, rules, and keyframes, and keeps <style /> in syncethcss - Library for writing CSS with literal objectsimport { create } from "free-style";
// Create a stylesheet instance.
const sheet = create();
// Register a new style, returning a class name to use.
const backgroundStyle = sheet.registerStyle({
backgroundColor: "red",
}); //=> "f14svl5e"
// Inject `<style>` into the `<head>`.
const styleElement = document.createElement("style");
styleElement.textContent = sheet.getStyles();
document.head.appendChild(styleElement);
// Render the style by using the class name.
React.render(
<div className={backgroundStyle}>Hello world!</div>,
document.body,
);const buttonStyle = sheet.registerStyle({
$displayName: "button",
backgroundColor: "red",
padding: 10,
});
console.log(buttonStyle); //=> "button_f65pi0b"Tip: The string returned by registerStyle is a unique hash of the content and used as the HTML class name. The $displayName is only used during development, and stripped in production (process.env.NODE_ENV === 'production').
Style.registerStyle({
background: [
"red",
"-moz-linear-gradient(left, red 0%, blue 100%)",
"-webkit-linear-gradient(left, red 0%, blue 100%)",
"-o-linear-gradient(left, red 0%, blue 100%)",
"-ms-linear-gradient(left, red 0%, blue 100%)",
"linear-gradient(to right, red 0%, blue 100%)",
],
}); //=> "f1n85iiq"Style.registerStyle({
color: "red",
"@media (min-width: 500px)": {
//=> "@media (min-width: 500px){.fk9tfor{color:blue}}"
color: "blue",
},
}); //=> "fk9tfor"Style.registerStyle({
color: "red",
".classy": {
//=> ".fc1zv17 .classy"
color: "blue",
},
}); //=> "fc1zv17"Style.registerStyle({
color: "red",
"&:hover": {
//=> ".f1h42yg6:hover"
color: "blue",
},
}); //=> "f1h42yg6"Tip: The ampersand (&) will be replaced by the parent selector at runtime.
const ellipsisStyle = {
whiteSpace: "nowrap",
overflow: "hidden",
textOverflow: "ellipsis",
};
const redEllipsisStyle = Style.registerStyle({
color: "red",
...ellipsisStyle,
}); //=> "fvxl8qs"
// Share rule between styles using computed properties.
const mediaQuery = "@media (min-width: 400px)";
const style = Style.registerStyle({
backgroundColor: "red",
[mediaQuery]: {
backgroundColor: "pink",
},
});Sometimes you need to skip the de-duping behavior of free-style. Use $unique to force separate styles:
Style.registerStyle({
color: "blue",
"&::-webkit-input-placeholder": {
color: `rgba(0, 0, 0, 0)`,
$unique: true,
},
"&::-moz-placeholder": {
color: `rgba(0, 0, 0, 0)`,
$unique: true,
},
"&::-ms-input-placeholder": {
color: `rgba(0, 0, 0, 0)`,
$unique: true,
},
}); //=> "f13byakl"
Style.getStyles(); //=> ".f13byakl{color:blue}.f13byakl::-webkit-input-placeholder{color:rgba(0, 0, 0, 0)}.f13byakl::-moz-placeholder{color:rgba(0, 0, 0, 0)}.f13byakl::-ms-input-placeholder{color:rgba(0, 0, 0, 0)}"const colorAnimation = Style.registerStyle({
$global: true,
"@keyframes &": {
from: { color: "red" },
to: { color: "blue" },
},
}); //=> "h1j3ughx"
const style = Style.registerStyle({
animationName: colorAnimation,
animationDuration: "1s",
}); //=> "fibanyf"Style.registerStyle({
$global: true,
"@font-face": {
fontFamily: '"Bitstream Vera Serif Bold"',
src: 'url("https://mdn.mozillademos.org/files/2468/VeraSeBd.ttf")',
},
});
Style.registerStyle({
$global: true,
"@media print": {
body: {
color: "red",
},
},
});
Style.registerStyle({
$global: true,
body: {
margin: 0,
padding: 0,
},
});
Style.registerStyle({
$global: true,
body: {
margin: 0,
padding: 0,
"@print": {
color: "#000",
},
},
h1: {
fontSize: "2em",
},
});Style.getStyles(); //=> ".f65pi0b{background-color:red;padding:10px}"This package is a pure ESM package and ships with TypeScript definitions. It cannot be require'd or used with CommonJS module resolution in TypeScript.
polishedclassnamescolorstyle-helperpostcss-jsinline-style-prefixerinsert-cssimage-urlDisplay names will automatically be removed when process.env.NODE_ENV === "production".
The only argument to create() is a map of change function handlers. All functions are required:
add(style: Container<any>, index: number)change(style: Container<any>, index: number)remove(style: Container<any>, index: number)All styles implement Container, so you can call getStyles() or clone().
Sheet, Style, and Rule have the ability to be merged.
const otherSheet = create();
sheet.merge(otherSheet); // Merge the current styles of `otherSheet` into `sheet`.
sheet.unmerge(otherSheet); // Remove the current styles of `otherSheet` from `sheet`.If you plan to re-use styles across Sheets, it will be more efficient to use compile once and register many times instead of registerStyle.
MIT