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Last active June 17, 2025 18:24
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Better states, plugin for Tailwind v4
Raw
index.html
<div class="grid gap-6 bg-slate-100 p-4">
<div class="grid gap-4 rounded-md border bg-white p-4 pressed-action:text-white">
<div class="group peer grid gap-2 rounded-md border p-4 hovered-action:bg-blue-100 pressed-action:bg-blue-500">
<h2 class="font-bold">group - peer - group-hovered-action</h2>
<button type="button" class="action block rounded border bg-amber-200 px-2 py-1 hovered:bg-amber-400">Action</button>
<div class="rounded bg-teal-100 p-2 group-hovered-action:bg-teal-500 group-pressed-action:bg-teal-800">I change state when <span class="inline-block rounded p-1 font-bold">Group &gt; Action</span> is hovered/pressed</div>
<div class="rounded bg-red-500 p-2 text-white">I don't change</div>
</div>
<div class="rounded bg-green-100 p-2 peer-hovered-action:bg-green-500 peer-pressed-action:bg-green-800">I change state whn <span class="inline-block rounded p-1 font-bold">Peer &gt; Action</span> is hovered/pressed</div>
<div class="rounded bg-indigo-100 p-2 peer-hovered:bg-indigo-500 peer-pressed:bg-indigo-800">I change states when anything on <span class="inline-block rounded p-1 font-bold">Peer</span> is hovered/pressed</div>
</div>
<div class="grid gap-4 rounded-md border bg-white p-4 pressed-action:text-white">
<div class="group/card peer/card grid gap-2 rounded-md border p-4 hovered-action:bg-blue-100 pressed-action:bg-blue-500">
<h2 class="font-bold">group/card - peer/card - group-hovered-action/card</h2>
<button type="button" class="action block rounded border bg-amber-200 px-2 py-1 hovered:bg-amber-400">Action</button>
<div class="rounded bg-teal-100 p-2 group-hovered-action/card:bg-teal-500 group-pressed-action/card:bg-teal-800">I change state when <span class="inline-block rounded p-1 font-bold">Group &gt; Action</span> is hovered/pressed</div>
<div class="rounded bg-red-500 p-2 text-white">I don't change</div>
</div>
<div class="rounded bg-green-100 p-2 peer-hovered-action/card:bg-green-500 peer-pressed-action/card:bg-green-800">I change state whn <span class="inline-block rounded p-1 font-bold">Peer &gt; Action</span> is hovered/pressed</div>
<div class="rounded bg-indigo-100 p-2 peer-hovered/card:bg-indigo-500 peer-pressed/card:bg-indigo-800">I change states when anything on <span class="inline-block rounded p-1 font-bold">Peer</span> is hovered/pressed</div>
</div>
<div class="grid gap-4 rounded-md border bg-white p-4 pressed-[.selector]:text-white">
<div class="group peer grid gap-2 rounded-md border p-4 hovered-[.selector]:bg-blue-100 pressed-[.selector]:bg-blue-500">
<h2 class="font-bold">group - peer - group-hovered-[.selector]</h2>
<button type="button" class="selector block rounded border bg-amber-200 px-2 py-1 hovered:bg-amber-400">Action</button>
<div class="rounded bg-teal-100 p-2 group-hovered-[.selector]:bg-teal-500 group-pressed-[.selector]:bg-teal-800">I change state when <span class="inline-block rounded p-1 font-bold">Group &gt; Action</span> is hovered/pressed</div>
<div class="rounded bg-red-500 p-2 text-white">I don't change</div>
</div>
<div class="rounded bg-green-100 p-2 peer-hovered-[.selector]:bg-green-500 peer-pressed-[.selector]:bg-green-800">I change state whn <span class="inline-block rounded p-1 font-bold">Peer &gt; Action</span> is hovered/pressed</div>
<div class="rounded bg-indigo-100 p-2 peer-hovered:bg-indigo-500 peer-pressed:bg-indigo-800">I change states when anything on <span class="inline-block rounded p-1 font-bold">Peer</span> is hovered/pressed</div>
</div>
<div class="grid gap-4 rounded-md border bg-white p-4 pressed-[.selector]:text-white">
<div class="group/card peer/card grid gap-2 rounded-md border p-4 hovered-[.selector]:bg-blue-100 pressed-[.selector]:bg-blue-500">
<h2 class="font-bold">group/card - peer/card - group-hovered-[.selector]/card</h2>
<button type="button" class="selector block rounded border bg-amber-200 px-2 py-1 hovered:bg-amber-400">Action</button>
<div class="rounded bg-teal-100 p-2 group-hovered-[.selector]/card:bg-teal-500 group-pressed-[.selector]/card:bg-teal-800">I change state when <span class="inline-block rounded p-1 font-bold">Group &gt; Action</span> is hovered/pressed</div>
<div class="rounded bg-red-500 p-2 text-white">I don't change</div>
</div>
<div class="rounded bg-green-100 p-2 peer-hovered-[.selector]/card:bg-green-500 peer-pressed-[.selector]/card:bg-green-800">I change state whn <span class="inline-block rounded p-1 font-bold">Peer &gt; Action</span> is hovered/pressed</div>
<div class="rounded bg-indigo-100 p-2 peer-hovered/card:bg-indigo-500 peer-pressed/card:bg-indigo-800">I change states when anything on <span class="inline-block rounded p-1 font-bold">Peer</span> is hovered/pressed</div>
</div>
</div>
Raw
plugin-better-state.ts
import plugin from "tailwindcss/plugin";
type MaybeString = string | null | undefined;
type UtilType = "group" | "peer";
// Main plugin
export default plugin(function ({ matchVariant, theme, e }) {
const values = {
values: {
DEFAULT: "",
...theme("betterStates", {}),
},
};
const selector = (state: string, prefix: MaybeString) => {
return `${prefix ?? "&"}:${state}:not(:disabled)`;
};
const maybeWrap = (state: string, prefix = "&", value: MaybeString) => {
return ["", null, undefined].includes(value)
? selector(state, prefix)
: `${prefix}:has(${selector(state, value)})`;
};
const merge = (
type: UtilType,
value: MaybeString,
modifier: string | null,
callback: (value: MaybeString, prefix: string) => string[]
) => {
const typeClass = modifier ? `.${type}\\/${e(modifier)}` : `.${type}`;
const append = type === "group" ? " &" : " ~ &";
return callback(value, `:merge(${typeClass})`).map((x) => `${x}${append}`);
};
// Hovered ________________________________________________________________________
const hovered = (value: MaybeString = null, prefix = "&") => [
maybeWrap("focus-visible", prefix, value),
maybeWrap("hover", prefix, value),
maybeWrap("has(:focus-visible)", prefix, value),
];
matchVariant("hovered", (value) => hovered(value), values);
matchVariant(
"group-hovered",
(value, { modifier }) => merge("group", value, modifier, hovered),
values
);
matchVariant(
"peer-hovered",
(value, { modifier }) => merge("peer", value, modifier, hovered),
values
);
// Pressed ________________________________________________________________________
const pressed = (value: MaybeString = null, prefix = "&") => [
maybeWrap("active", prefix, value),
maybeWrap("has(:active)", prefix, value),
`@media (hover: none) { ${maybeWrap("hover", prefix, value)} }`,
`@media (hover: none) { ${maybeWrap("focus", prefix, value)} }`,
];
matchVariant("pressed", (value) => pressed(value), values);
matchVariant(
"group-pressed",
(value, { modifier }) => merge("group", value, modifier, pressed),
values
);
matchVariant(
"peer-pressed",
(value, { modifier }) => merge("peer", value, modifier, pressed),
values
);
});
Raw
tailwind.config.js
const plugin = require('tailwindcss/plugin')
/** @type {import('tailwindcss').Config} */
export default {
theme: {
extend: {
betterStates: {
action: '.action',
},
},
},
plugins: [
plugin(function ({ matchVariant, theme, e }) {
const values = {
values: {
DEFAULT: '',
...theme('betterStates', {}),
},
}
const selector = (state, prefix) => {
return `${prefix ?? '&'}:${state}:not(:disabled)`
}
const maybeWrap = (state, prefix = '&', value) => {
return ['', null, undefined].includes(value)
? selector(state, prefix)
: `${prefix}:has(${selector(state, value)})`
}
const merge = (type, value, modifier, callback) => {
const typeClass = modifier ? `.${type}\\/${e(modifier)}` : `.${type}`
const append = type === 'group' ? ' &' : ' ~ &'
return callback(value, `:merge(${typeClass})`).map((x) => `${x}${append}`)
}
// Hovered ________________________________________________________________________
const hovered = (value = null, prefix = '&') => [
maybeWrap('focus-visible', prefix, value),
maybeWrap('hover', prefix, value),
maybeWrap('has(:focus-visible)', prefix, value),
]
matchVariant('hovered', (value) => hovered(value), values)
matchVariant(
'group-hovered',
(value, { modifier }) => merge('group', value, modifier, hovered),
values,
)
matchVariant(
'peer-hovered',
(value, { modifier }) => merge('peer', value, modifier, hovered),
values,
)
// Pressed ________________________________________________________________________
const pressed = (value = null, prefix = '&') => [
maybeWrap('active', prefix, value),
maybeWrap('has(:active)', prefix, value),
`@media (hover: none) { ${maybeWrap('hover', prefix, value)} }`,
`@media (hover: none) { ${maybeWrap('focus', prefix, value)} }`,
]
matchVariant('pressed', (value) => pressed(value), values)
matchVariant(
'group-pressed',
(value, { modifier }) => merge('group', value, modifier, pressed),
values,
)
matchVariant(
'peer-pressed',
(value, { modifier }) => merge('peer', value, modifier, pressed),
values,
)
}),
],
}
Raw
tailwind.config.ts
/** @type {import('tailwindcss').Config} */
export const theme = {
extend: {
betterStates: {
action: ".action",
},
};
export const plugins = [
require("./plugin-better-state"),
];
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