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import { AstroIntegration, AstroRenderer, ViteUserConfig } from 'astro';
function getRenderer(): AstroRenderer {
return {
name: '@astrojs/preact',
clientEntrypoint: '@astrojs/preact/client.js',
serverEntrypoint: '@astrojs/preact/server.js',
jsxImportSource: 'preact',
jsxTransformOptions: async () => {
const {
default: { default: jsx },
// @ts-expect-error types not found
} = await import('@babel/plugin-transform-react-jsx');
return {
plugins: [jsx({}, { runtime: 'automatic', importSource: 'preact' })],
};
},
};
}
function getCompatRenderer(): AstroRenderer {
return {
name: '@astrojs/preact',
clientEntrypoint: '@astrojs/preact/client.js',
serverEntrypoint: '@astrojs/preact/server.js',
jsxImportSource: 'react',
jsxTransformOptions: async () => {
const {
default: { default: jsx },
// @ts-expect-error types not found
} = await import('@babel/plugin-transform-react-jsx');
return {
plugins: [
jsx({}, { runtime: 'automatic', importSource: 'preact/compat' }),
[
'babel-plugin-module-resolver',
{
alias: {
react: 'preact/compat',
'react-dom/test-utils': 'preact/test-utils',
'react-dom': 'preact/compat',
'react/jsx-runtime': 'preact/jsx-runtime',
},
},
],
],
};
},
};
}
function getViteConfiguration(compat?: boolean): ViteUserConfig {
const viteConfig: ViteUserConfig = {
optimizeDeps: {
include: [
'@astrojs/preact/client.js',
'preact',
'preact/jsx-runtime',
'preact-render-to-string',
],
exclude: ['@astrojs/preact/server.js'],
},
ssr: {
external: ['preact-render-to-string'],
},
};
if (compat) {
viteConfig.optimizeDeps!.include!.push(
'preact/compat',
'preact/test-utils',
'preact/compat/jsx-runtime'
);
viteConfig.resolve = {
alias: [
{ find: 'react', replacement: 'preact/compat' },
{ find: 'react-dom/test-utils', replacement: 'preact/test-utils' },
{ find: 'react-dom', replacement: 'preact/compat' },
{ find: 'react/jsx-runtime', replacement: 'preact/jsx-runtime' },
],
dedupe: ['preact/compat'],
};
}
return viteConfig;
}
export default function ({ compat }: { compat?: boolean } = {}): AstroIntegration {
return {
name: '@astrojs/preact',
hooks: {
'astro:config:setup': ({ addRenderer, updateConfig }) => {
if (compat) addRenderer(getCompatRenderer());
addRenderer(getRenderer());
updateConfig({
vite: getViteConfiguration(compat),
});
},
},
};
}
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