[zero] Export extendTheme for creating a zero-runtime theme

apps/zero-runtime-next-app/next.config.js

@@ -1,24 +1,89 @@
 /* eslint-env node */
 // eslint-ignore-next-line import/no-unresolved
 const { withZeroPlugin } = require('@mui/zero-next-plugin');
-const { experimental_extendTheme: extendTheme } = require('@mui/material/styles');
+const { extendTheme } = require('@mui/zero-runtime');
+
+/**
+ * @typedef {import('@mui/zero-next-plugin').ZeroPluginConfig} ZeroPluginConfig
+ */
 
 const theme = extendTheme({
-  cssVarPrefix: 'app',
-  components: {
-    MuiBadge: {
-      defaultProps: {
-        color: 'error',
+  'max-width': '1100px',
+  'border-radius': '12px',
+  'font-mono': `ui-monospace, Menlo, Monaco, 'Cascadia Mono', 'Segoe UI Mono', 'Roboto Mono', 'Oxygen Mono', 'Ubuntu Monospace', 'Source Code Pro', 'Fira Mono', 'Droid Sans Mono', 'Courier New', monospace`,
+  colorSchemes: {
+    light: {
+      'foreground-rgb': '0, 0, 0',
+      'background-start-rgb': '214, 219, 220',
+      'background-end-rgb': '255, 255, 255',
+      'primary-glow': `conic-gradient(
+        from 180deg at 50% 50%,
+        #16abff33 0deg,
+        #0885ff33 55deg,
+        #54d6ff33 120deg,
+        #0071ff33 160deg,
+        transparent 360deg
+      )`,
+      'secondary-glow': `radial-gradient(rgba(255, 255, 255, 1), rgba(255, 255, 255, 0))`,
+      title: {
+        'start-rbg': '239, 245, 249',
+        'end-rgb': '228, 232, 233',
+        border: `conic-gradient(
+          #00000080,
+          #00000040,
+          #00000030,
+          #00000020,
+          #00000010,
+          #00000010,
+          #00000080
+        )`,
+      },
+      callout: {
+        rgb: '238, 240, 241',
+        'border-rgb': '172, 175, 176',
+      },
+      card: {
+        rgb: '180, 185, 188',
+        'border-rgb': '131, 134, 135',
+      },
+    },
+    dark: {
+      'foreground-rgb': '255, 255, 255',
+      'background-start-rgb': '0, 0, 0',
+      'background-end-rgb': '0, 0, 0',
+      'primary-glow': `radial-gradient(rgba(1, 65, 255, 0.4), rgba(1, 65, 255, 0))`,
+      'secondary-glow': `linear-gradient(
+        to bottom right,
+        rgba(1, 65, 255, 0),
+        rgba(1, 65, 255, 0),
+        rgba(1, 65, 255, 0.3)
+      )`,
+      title: {
+        'start-rbg': '2, 13, 46',
+        'end-rgb': '2, 5, 19',
+        border: `conic-gradient(
+          #ffffff80,
+          #ffffff40,
+          #ffffff30,
+          #ffffff20,
+          #ffffff10,
+          #ffffff10,
+          #ffffff80
+        )`,
+      },
+      callout: {
+        rgb: '20, 20, 20',
+        'border-rgb': '108, 108, 108',
+      },
+      card: {
+        rgb: '100, 100, 100',
+        'border-rgb': '200, 200, 200',
       },
     },
   },
 });
-theme.getColorSchemeSelector = (targetColorScheme) =>
-  `[data-mui-color-scheme="${targetColorScheme}"] &`;
 
-/**
- * @typedef {import('@mui/zero-next-plugin').ZeroPluginConfig} ZeroPluginConfig
- */
+// { [theme.getColorSchemeSelector('dark')]: { color: 'black' } }
 
 /**
  * @type {ZeroPluginConfig}

apps/zero-runtime-next-app/src/app/globals.css

@@ -1,75 +1,3 @@
-:root {
-  --max-width: 1100px;
-  --border-radius: 12px;
-  --font-mono: ui-monospace, Menlo, Monaco, 'Cascadia Mono', 'Segoe UI Mono', 'Roboto Mono',
-    'Oxygen Mono', 'Ubuntu Monospace', 'Source Code Pro', 'Fira Mono', 'Droid Sans Mono',
-    'Courier New', monospace;
-
-  --foreground-rgb: 0, 0, 0;
-  --background-start-rgb: 214, 219, 220;
-  --background-end-rgb: 255, 255, 255;
-
-  --primary-glow: conic-gradient(
-    from 180deg at 50% 50%,
-    #16abff33 0deg,
-    #0885ff33 55deg,
-    #54d6ff33 120deg,
-    #0071ff33 160deg,
-    transparent 360deg
-  );
-  --secondary-glow: radial-gradient(rgba(255, 255, 255, 1), rgba(255, 255, 255, 0));
-
-  --tile-start-rgb: 239, 245, 249;
-  --tile-end-rgb: 228, 232, 233;
-  --tile-border: conic-gradient(
-    #00000080,
-    #00000040,
-    #00000030,
-    #00000020,
-    #00000010,
-    #00000010,
-    #00000080
-  );
-
-  --callout-rgb: 238, 240, 241;
-  --callout-border-rgb: 172, 175, 176;
-  --card-rgb: 180, 185, 188;
-  --card-border-rgb: 131, 134, 135;
-}
-
-@media (prefers-color-scheme: dark) {
-  :root {
-    --foreground-rgb: 255, 255, 255;
-    --background-start-rgb: 0, 0, 0;
-    --background-end-rgb: 0, 0, 0;
-
-    --primary-glow: radial-gradient(rgba(1, 65, 255, 0.4), rgba(1, 65, 255, 0));
-    --secondary-glow: linear-gradient(
-      to bottom right,
-      rgba(1, 65, 255, 0),
-      rgba(1, 65, 255, 0),
-      rgba(1, 65, 255, 0.3)
-    );
-
-    --tile-start-rgb: 2, 13, 46;
-    --tile-end-rgb: 2, 5, 19;
-    --tile-border: conic-gradient(
-      #ffffff80,
-      #ffffff40,
-      #ffffff30,
-      #ffffff20,
-      #ffffff10,
-      #ffffff10,
-      #ffffff80
-    );
-
-    --callout-rgb: 20, 20, 20;
-    --callout-border-rgb: 108, 108, 108;
-    --card-rgb: 100, 100, 100;
-    --card-border-rgb: 200, 200, 200;
-  }
-}
-
 * {
   box-sizing: border-box;
   padding: 0;

apps/zero-runtime-next-app/src/app/page.tsx

@@ -1,18 +1,32 @@
 import Image from 'next/image';
-import { styled } from '@mui/zero-runtime';
-import Badge from '@mui/material/Badge';
+import { styled, css } from '@mui/zero-runtime';
 import styles from './page.module.css';
 
-const Main = styled.main({
-  color: 'rgb(var(--foreground-rgb))',
+const visuallyHidden = css({
+  border: 0,
+  clip: 'rect(0 0 0 0)',
+  height: '1px',
+  margin: -1,
+  overflow: 'hidden',
+  padding: 0,
+  position: 'absolute',
+  whiteSpace: 'nowrap',
+  width: '1px',
+});
+
+const Main = styled.main(({ theme }) => ({
+  color: theme.vars['foreground-rgb'],
   background: `linear-gradient(to bottom, transparent, rgb(var(--background-end-rgb))) rgb(var(--background-start-rgb))`,
   display: 'flex',
   flexDirection: 'column',
   justifyContent: 'space-between',
   alignItems: 'center',
   padding: '6rem',
   minHeight: '100vh',
-});
+  ...theme.applyStyles('dark', {
+    color: 'yellow',
+  }),
+}));
 
 const Description = styled.div({
   display: 'inherit',
@@ -78,9 +92,7 @@ const Description = styled.div({
 export default function Home() {
   return (
     <Main>
-      <Badge variant="dot">
-        <div>Hey</div>
-      </Badge>
+      <div className={visuallyHidden}>I am invisible</div>
       <Description>
         <p>
           Get started by editing&nbsp;

apps/zero-runtime-next-app/src/augment.d.ts

@@ -1,14 +1,34 @@
-import type { Theme } from '@mui/material/styles';
-import type {} from '@mui/material/themeCssVarsAugmentation';
-import '@mui/zero-runtime/theme';
+import type { ExtendTheme } from '@mui/zero-runtime';
 
 declare module '@mui/zero-runtime/theme' {
-  export interface ThemeArgs {
-    theme: Omit<Theme, 'applyStyles'> & {
-      applyStyles: (
-        colorScheme: 'light' | 'dark',
-        styles: Record<string, any>,
-      ) => Record<string, any>;
+  interface ThemeTokens {
+    'max-width': string;
+    'border-radius': string;
+    'font-mono': string;
+    'foreground-rgb': string;
+    'background-start-rgb': string;
+    'background-end-rgb': string;
+    'primary-glow': string;
+    'secondary-glow': string;
+    title: {
+      'start-rgb': string;
+      'end-rgb': string;
+      border: string;
     };
+    callout: {
+      rgb: string;
+      'border-rgb': string;
+    };
+    card: {
+      rgb: string;
+      'border-rgb': string;
+    };
+  }
+
+  interface ThemeArgs {
+    theme: ExtendTheme<{
+      colorScheme: 'light' | 'dark';
+      tokens: ThemeTokens;
+    }>;
   }
 }

packages/mui-system/src/cssVars/prepareCssVars.ts

@@ -2,18 +2,24 @@ import { deepmerge } from '@mui/utils';
 import cssVarsParser from './cssVarsParser';
 
 export interface DefaultCssVarsTheme {
-  colorSchemes: Record<string, any>;
+  colorSchemes?: Record<string, any>;
+  defaultColorScheme?: string;
 }
 
-function prepareCssVars<T extends DefaultCssVarsTheme, ThemeVars extends Record<string, any>>(
+function prepareCssVars<
+  T extends DefaultCssVarsTheme,
+  ThemeVars extends Record<string, any>,
+  Selector = any,
+>(
   theme: T,
   parserConfig?: {
     prefix?: string;
     shouldSkipGeneratingVar?: (objectPathKeys: Array<string>, value: string | number) => boolean;
+    getSelector?: (colorScheme: string | undefined, css: Record<string, any>) => Selector;
   },
 ) {
   // @ts-ignore - ignore components do not exist
-  const { colorSchemes = {}, components, ...otherTheme } = theme;
+  const { colorSchemes = {}, components, defaultColorScheme = 'light', ...otherTheme } = theme;
   const {
     vars: rootVars,
     css: rootCss,
@@ -23,26 +29,33 @@ function prepareCssVars<T extends DefaultCssVarsTheme, ThemeVars extends Record<
 
   const colorSchemesMap: Record<string, { css: Record<string, string | number>; vars: ThemeVars }> =
     {};
-  const { light, ...otherColorSchemes } = colorSchemes;
+  const { [defaultColorScheme]: light, ...otherColorSchemes } = colorSchemes;
   Object.entries(otherColorSchemes || {}).forEach(([key, scheme]) => {
     const { vars, css, varsWithDefaults } = cssVarsParser<ThemeVars>(scheme, parserConfig);
     themeVars = deepmerge(themeVars, varsWithDefaults);
     colorSchemesMap[key] = { css, vars };
   });
   if (light) {
-    // light color scheme vars should be merged last to set as default
+    // default color scheme vars should be merged last to set as default
     const { css, vars, varsWithDefaults } = cssVarsParser<ThemeVars>(light, parserConfig);
     themeVars = deepmerge(themeVars, varsWithDefaults);
-    colorSchemesMap.light = { css, vars };
+    colorSchemesMap[defaultColorScheme] = { css, vars };
   }
 
   const generateCssVars = (colorScheme?: string) => {
     if (!colorScheme) {
-      return { css: { ...rootCss }, vars: rootVars };
+      const css = { ...rootCss };
+      return {
+        css,
+        vars: rootVars,
+        selector: parserConfig?.getSelector?.(colorScheme, css) || ':root',
+      };
     }
+    const css = { ...colorSchemesMap[colorScheme].css };
     return {
-      css: { ...colorSchemesMap[colorScheme].css },
+      css,
       vars: colorSchemesMap[colorScheme].vars,
+      selector: parserConfig?.getSelector?.(colorScheme, css) || ':root',
     };
   };