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import { fileURLToPath } from 'node:url';
import type { AstroIntegration } from 'astro';
import autoprefixerPlugin from 'autoprefixer';
import tailwindPlugin from 'tailwindcss';
import type { CSSOptions, UserConfig } from 'vite';
async function getPostCssConfig(
root: UserConfig['root'],
postcssInlineOptions: CSSOptions['postcss']
) {
let postcssConfigResult;
// Check if postcss config is not inlined
if (!(typeof postcssInlineOptions === 'object' && postcssInlineOptions !== null)) {
let { default: postcssrc } = await import('postcss-load-config');
const searchPath = typeof postcssInlineOptions === 'string' ? postcssInlineOptions : root!;
try {
postcssConfigResult = await postcssrc({}, searchPath);
} catch {
postcssConfigResult = null;
}
}
return postcssConfigResult;
}
async function getViteConfiguration(
tailwindConfigPath: string | undefined,
nesting: boolean,
root: string,
postcssInlineOptions: CSSOptions['postcss']
): Promise<Partial<UserConfig>> {
// We need to manually load postcss config files because when inlining the tailwind and autoprefixer plugins,
// that causes vite to ignore postcss config files
const postcssConfigResult = await getPostCssConfig(root, postcssInlineOptions);
const postcssOptions = postcssConfigResult?.options ?? {};
const postcssPlugins = postcssConfigResult?.plugins?.slice() ?? [];
if (nesting) {
const tailwindcssNestingPlugin = (await import('tailwindcss/nesting/index.js')).default;
postcssPlugins.push(tailwindcssNestingPlugin());
}
postcssPlugins.push(tailwindPlugin(tailwindConfigPath));
postcssPlugins.push(autoprefixerPlugin());
return {
css: {
postcss: {
...postcssOptions,
plugins: postcssPlugins,
},
},
};
}
type TailwindOptions = {
/**
* Path to your tailwind config file
* @default 'tailwind.config.mjs'
*/
configFile?: string;
/**
* Apply Tailwind's base styles
* Disabling this is useful when further customization of Tailwind styles
* and directives is required. See {@link https://tailwindcss.com/docs/functions-and-directives#tailwind Tailwind's docs}
* for more details on directives and customization.
* @default true
*/
applyBaseStyles?: boolean;
/**
* Add CSS nesting support using `tailwindcss/nesting`. See {@link https://tailwindcss.com/docs/using-with-preprocessors#nesting Tailwind's docs}
* for how this works with `postcss-nesting` and `postcss-nested`.
*/
nesting?: boolean;
};
export default function tailwindIntegration(options?: TailwindOptions): AstroIntegration {
const applyBaseStyles = options?.applyBaseStyles ?? true;
const customConfigPath = options?.configFile;
const nesting = options?.nesting ?? false;
return {
name: '@astrojs/tailwind',
hooks: {
'astro:config:setup': async ({ config, updateConfig, injectScript }) => {
// Inject the Tailwind postcss plugin
updateConfig({
vite: await getViteConfiguration(
customConfigPath,
nesting,
fileURLToPath(config.root),
config.vite.css?.postcss
),
});
if (applyBaseStyles) {
// Inject the Tailwind base import
injectScript('page-ssr', `import '@astrojs/tailwind/base.css';`);
}
},
},
};
}
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