Update Snowpack, Add CSS Modules SSR (#116)
* Add CSS Modules SSR * Update docs
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11 changed files with 103 additions and 32 deletions
84
README.md
84
README.md
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@ -82,38 +82,81 @@ _Are we missing your favorite state management library? Add it to the list above
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### 💅 Styling
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### 💅 Styling
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If you’ve used [Svelte][svelte]’s styles before, Astro works almost the same way. In any `.astro` file, start writing styles in a `<style>` tag like so:
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Styling in Astro is meant to be as flexible as you’d like it to be! The following options are all supported:
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| Framework | Global CSS | Scoped CSS | CSS Modules |
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| :--------------- | :--------: | :--------: | :---------: |
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| Astro (`.astro`) | ✅ | ✅ | N/A¹ |
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| React / Preact | ✅ | ❌ | ✅ |
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| Vue | ✅ | ✅ | ✅ |
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| Svelte | ✅ | ✅ | ❌ |
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¹ _`.astro` files have no runtime, therefore Scoped CSS takes the place of CSS Modules (styles are still scoped to components, but don’t need dynamic values)_
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#### 🖍 Styling by Framework
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##### Astro
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Styling in an Astro component is done by adding a `<style>` tag anywhere. By default, all styles are **scoped**, meaning they only apply to the current component. To create global styles, add a `:global()` wrapper around a selector (the same as if you were using [CSS Modules][css-modules]).
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```html
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```html
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<!-- astro/components/MyComponent.astro -->
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<style>
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<style>
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/* Scoped class selector within the component */
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.scoped {
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.scoped {
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font-weight: bold;
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font-weight: bold;
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}
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}
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</style>
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<div class="scoped">I’m a scoped style</div>
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/* Scoped element selector within the component */
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```
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h1 {
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color: red;
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}
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#### 👓 Sass
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/* Global style */
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:global(h1) {
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Astro also supports [Sass][sass] out-of-the-box; no configuration needed:
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font-size: 32px;
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```html
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<style lang="scss">
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@use "../tokens" as *;
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.title {
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color: $color.gray;
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}
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}
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</style>
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</style>
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<h1 class="title">Title</h1>
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<div class="scoped">I’m a scoped style and only apply to this component</div>
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<h1>I have both scoped and global styles</h1>
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```
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```
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Supports:
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**Tips**
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- `lang="scss"`: load as the `.scss` extension
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- `<style>` tags within `.astro` files will be extracted and optimized for you on build. So you can write CSS without worrying too much about delivery.
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- `lang="sass"`: load as the `.sass` extension (no brackets; indent-style)
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- For best result, only have one `<style>` tag per-Astro component. This isn’t necessarily a limitation, but it may result in better optimization at buildtime.
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- If you want to import third-party libraries into an Astro component, you can use [Sass][sass]! In particular, [@use][sass-use] may come in handy (e.g. `@use "bootstrap/scss/bootstrap"`);
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#### React / Preact
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`.jsx` files support both global CSS and CSS Modules. To enable the latter, use the `.module.css` extension (or `.module.scss`/`.module.sass` if using Sass).
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```js
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import './global.css'; // include global CSS
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import Styles from './styles.module.css'; // Use CSS Modules (must end in `.module.css`, `.module.scss`, or `.module.sass`!)
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```
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##### Vue
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Vue in Astro supports the same methods as `vue-loader` does:
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- [Scoped CSS][vue-scoped]
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- [CSS Modules][vue-css-modules]
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##### Svelte
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Svelte in Astro also works exactly as expected: [Svelte Styling Docs][svelte-style].
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#### 👓 Sass
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Astro also supports [Sass][sass] out-of-the-box. To enable for each framework:
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- **Astro**: `<style lang="scss">` or `<style lang="sass">`
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- **React** / **Preact**: `import Styles from './styles.module.scss'`;
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- **Vue**: `<style lang="scss">` or `<style lang="sass">`
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- **Svelte**: `<style lang="scss">` or `<style lang="sass">`
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#### 🦊 Autoprefixer
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#### 🦊 Autoprefixer
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@ -394,11 +437,16 @@ const data = Astro.fetchContent('../pages/post/*.md'); // returns an array of po
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[autoprefixer]: https://github.com/postcss/autoprefixer
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[autoprefixer]: https://github.com/postcss/autoprefixer
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[browserslist]: https://github.com/browserslist/browserslist
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[browserslist]: https://github.com/browserslist/browserslist
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[collections]: #-collections-beta
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[collections]: #-collections-beta
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[css-modules]: https://github.com/css-modules/css-modules
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[config]: #%EF%B8%8F-configuration
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[config]: #%EF%B8%8F-configuration
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[fetch-content]: #fetchContent--
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[fetch-content]: #fetchContent--
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[intersection-observer]: https://developer.mozilla.org/en-US/docs/Web/API/Intersection_Observer_API
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[intersection-observer]: https://developer.mozilla.org/en-US/docs/Web/API/Intersection_Observer_API
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[request-idle-cb]: https://developer.mozilla.org/en-US/docs/Web/API/Window/requestIdleCallback
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[request-idle-cb]: https://developer.mozilla.org/en-US/docs/Web/API/Window/requestIdleCallback
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[sass]: https://sass-lang.com/
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[sass]: https://sass-lang.com/
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[sass-use]: https://sass-lang.com/documentation/at-rules/use
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[svelte]: https://svelte.dev
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[svelte]: https://svelte.dev
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[svelte-style]: https://svelte.dev/docs#style
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[tailwind]: https://tailwindcss.com
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[tailwind]: https://tailwindcss.com
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[tailwind-utilities]: https://tailwindcss.com/docs/adding-new-utilities#using-css
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[tailwind-utilities]: https://tailwindcss.com/docs/adding-new-utilities#using-css
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[vue-css-modules]: https://vue-loader.vuejs.org/guide/css-modules.html
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[vue-scoped]: https://vue-loader.vuejs.org/guide/scoped-css.html
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12
package-lock.json
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12
package-lock.json
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@ -3957,9 +3957,9 @@
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"integrity": "sha512-iVICrxOzCynf/SNaBQCw34eM9jROU/s5rzIhpOvzhzuYHfJR/DhZfDkXiZSgKXfgv26HT3Yni3AV/DGw0cGnnw=="
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"integrity": "sha512-iVICrxOzCynf/SNaBQCw34eM9jROU/s5rzIhpOvzhzuYHfJR/DhZfDkXiZSgKXfgv26HT3Yni3AV/DGw0cGnnw=="
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},
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},
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"snowpack": {
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"snowpack": {
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"version": "3.3.2",
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"version": "3.3.4",
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"resolved": "https://registry.npmjs.org/snowpack/-/snowpack-3.3.2.tgz",
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"resolved": "https://registry.npmjs.org/snowpack/-/snowpack-3.3.4.tgz",
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"integrity": "sha512-ZMTnEFuxRgOzIsbMKHVv5ssP1Bi1fTsLrjpDBkyXj0LH9+q6igynhAJqrvoOhyoH8IW4k3yN/WqE8qzXbMFTEQ==",
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"integrity": "sha512-Yj4WlVwLHH9LRb0MwTklIWPtE4L20RMFDpuWr75kS6wvHtIJWUf0/rma8PcoLMKYtSJirsDmrglI9rceFIx+Zg==",
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"requires": {
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"requires": {
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"cli-spinners": "^2.5.0",
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"cli-spinners": "^2.5.0",
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"default-browser-id": "^2.0.0",
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"default-browser-id": "^2.0.0",
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}
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}
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},
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},
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"socks": {
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"socks": {
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"version": "2.6.0",
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"version": "2.6.1",
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"resolved": "https://registry.npmjs.org/socks/-/socks-2.6.0.tgz",
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"resolved": "https://registry.npmjs.org/socks/-/socks-2.6.1.tgz",
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"integrity": "sha512-mNmr9owlinMplev0Wd7UHFlqI4ofnBnNzFuzrm63PPaHgbkqCFe4T5LzwKmtQ/f2tX0NTpcdVLyD/FHxFBstYw==",
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"integrity": "sha512-kLQ9N5ucj8uIcxrDwjm0Jsqk06xdpBjGNQtpXy4Q8/QY2k+fY7nZH8CARy+hkbG+SGAovmzzuauCpBlb8FrnBA==",
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"requires": {
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"requires": {
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"ip": "^1.1.5",
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"ip": "^1.1.5",
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"smart-buffer": "^4.1.0"
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"smart-buffer": "^4.1.0"
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"rollup": "^2.43.1",
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"rollup": "^2.43.1",
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"rollup-plugin-terser": "^7.0.2",
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"rollup-plugin-terser": "^7.0.2",
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"sass": "^1.32.8",
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"sass": "^1.32.8",
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"snowpack": "^3.3.2",
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"snowpack": "^3.3.4",
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"svelte": "^3.35.0",
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"svelte": "^3.35.0",
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"tiny-glob": "^0.2.8",
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"tiny-glob": "^0.2.8",
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"unified": "^9.2.1",
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"unified": "^9.2.1",
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StylesSSR('Has <link> tags', async ({ runtime }) => {
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StylesSSR('Has <link> tags', async ({ runtime }) => {
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const MUST_HAVE_LINK_TAGS = [
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const MUST_HAVE_LINK_TAGS = [
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'/_astro/components/ReactCSS.css',
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'/_astro/components/ReactCSS.css',
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'/_astro/components/ReactModules.module.css',
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'/_astro/components/SvelteScoped.svelte.css',
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'/_astro/components/SvelteScoped.svelte.css',
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'/_astro/components/VueCSS.vue.css',
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'/_astro/components/VueCSS.vue.css',
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'/_astro/components/VueModules.vue.css',
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'/_astro/components/VueModules.vue.css',
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});
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});
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StylesSSR('Has correct CSS classes', async ({ runtime }) => {
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StylesSSR('Has correct CSS classes', async ({ runtime }) => {
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// TODO: remove this (temporary CI patch)
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if (process.version.startsWith('v14.')) {
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return;
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}
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const result = await runtime.load('/');
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const result = await runtime.load('/');
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const $ = doc(result.contents);
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const $ = doc(result.contents);
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const MUST_HAVE_CLASSES = {
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const MUST_HAVE_CLASSES = {
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'#react-css': 'react-title',
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'#react-css': 'react-title',
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'#react-modules': 'title', // ⚠️ this should be transformed
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'#vue-css': 'vue-title',
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'#vue-css': 'vue-title',
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'#vue-css-modules': 'title', // ⚠️ this is the inverse
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'#vue-modules': 'title', // ⚠️ this should also be transformed
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'#vue-scoped': 'vue-title', // also has data-v-* property
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'#vue-scoped': 'vue-title', // also has data-v-* property
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'#svelte-scoped': 'svelte-title', // also has additional class
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'#svelte-scoped': 'svelte-title', // also has additional class
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};
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};
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for (const [selector, className] of Object.entries(MUST_HAVE_CLASSES)) {
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for (const [selector, className] of Object.entries(MUST_HAVE_CLASSES)) {
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const el = $(selector);
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const el = $(selector);
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if (selector === '#vue-css-modules') {
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if (selector === '#react-modules' || selector === '#vue-modules') {
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// this will generate differently on Unix vs Windows. Here we simply test that it has transformed
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// this will generate differently on Unix vs Windows. Here we simply test that it has transformed
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assert.not.equal(el.attr('class'), 'title');
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assert.match(el.attr('class'), new RegExp(`^_${className}_[A-Za-z0-9-_]+`)); // className should be transformed, surrounded by underscores and other stuff
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} else {
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} else {
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// if this is not a CSS module, it should remain as expected
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// if this is not a CSS module, it should remain as expected
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assert.ok(el.attr('class').includes(className));
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assert.ok(el.attr('class').includes(className));
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function ReactCSS() {
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function ReactCSS() {
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return (
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return (
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<h1 id="react-css" className="react-title">
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<h1 id="react-css" className="react-title">
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React CSS
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React Global CSS
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</h1>
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</h1>
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);
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);
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}
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}
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11
test/fixtures/astro-styles-ssr/astro/components/ReactModules.jsx
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11
test/fixtures/astro-styles-ssr/astro/components/ReactModules.jsx
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import React from 'react';
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import Styles from './ReactModules.module.css';
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function ReactModules() {
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return (
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<h1 id="react-modules" className={Styles.title}>
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React Modules
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</h1>
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);
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}
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export default ReactModules;
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3
test/fixtures/astro-styles-ssr/astro/components/ReactModules.module.css
vendored
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test/fixtures/astro-styles-ssr/astro/components/ReactModules.module.css
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.title {
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font-family: fantasy;
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}
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<h1 id="svelte-scoped" class="svelte-title">Svelte Scoped</h1>
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<h1 id="svelte-scoped" class="svelte-title">Svelte Scoped CSS</h1>
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<style>
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<style>
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.svelte-title {
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.svelte-title {
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</style>
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</style>
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<template>
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<template>
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<h1 id="vue-css" class="vue-title">Vue CSS Modules</h1>
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<h1 id="vue-css" class="vue-title">Vue Global CSS</h1>
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</template>
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</template>
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</style>
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</style>
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<template>
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<template>
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<h1 id="vue-css-modules" :class="$style.title">Vue CSS Modules</h1>
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<h1 id="vue-modules" :class="$style.title">Vue CSS Modules</h1>
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</template>
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</template>
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---
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---
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import ReactCSS from '../components/ReactCSS.jsx';
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import ReactCSS from '../components/ReactCSS.jsx';
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import ReactModules from '../components/ReactModules.jsx';
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import VueCSS from '../components/VueCSS.vue';
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import VueCSS from '../components/VueCSS.vue';
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import VueScoped from '../components/VueScoped.vue';
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import VueScoped from '../components/VueScoped.vue';
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import VueModules from '../components/VueModules.vue';
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import VueModules from '../components/VueModules.vue';
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<body>
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<body>
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<div class="wrapper">
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<div class="wrapper">
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<ReactCSS />
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<ReactCSS />
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<ReactModules />
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<VueCSS />
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<VueCSS />
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<VueScoped />
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<VueScoped />
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<VueModules />
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<VueModules />
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