# Astro Font Optimization
`astro-font` will automatically optimize your Custom Fonts, Local Fonts, Fonts over any CDN and Google fonts for performance.
The project is inspired by the [Next.js Font Optimization](https://nextjs.org/docs/pages/building-your-application/optimizing/fonts).
## Installation
```bash
npm install astro-font
## or yarn
yarn add astro-font
## or pnpm
pnpm add astro-font
```
## Google Fonts
Automatically optimize any Google Font. To use the font in all your pages, add it to `` file in an Astro layout:
### Use Google Fonts URL directly
```astro
---
import { AstroFont } from "astro-font";
---
```
### Pick fonts from Google Fonts URL
```astro
---
import { AstroFont } from "astro-font";
---
```
## Local Fonts
```astro
---
import { join } from "node:path";
import { AstroFont } from "astro-font";
---
```
## Using Multiple Fonts
You can import and use multiple fonts in your application. There are two approaches you can take.
Just extend the array of the config to contain the new collection of the fonts:
```astro
---
import { join } from "node:path";
import { AstroFont } from "astro-font";
---
span",
fallback: "serif",
},
]}
/>
```
## Configuring CSS Classes
The `selector` attribute per config object can be used to configure which CSS class will reflect the whole CSS (automatically including the references to fallback fonts CSS).
```astro
---
import { join } from "node:path"
---
span",
},
]}
/>
```
## Configuring CSS Variables
The `cssVariable` attribute per config object can be used to configure which CSS variable will reflect in your document's `:root` CSS selector (automatically including the references to fallback fonts CSS).
```astro
---
import { join } from "node:path"
---
```
## Configuring Fallback Font Name
The `fallbackName` attribute per config object can be used to configure the fallback font's family name (in CSS).
```astro
---
import { join } from "node:path"
---
```
### With Cloudflare Workers
`astro-font` uses the following node imports:
- `node:path`
- `node:buffer`
#### Step 1. Enable nodejs_compat
To make sure that it works in Cloudflare Workers, please enable the `node_compatibiliy` flag per the guide https://developers.cloudflare.com/workers/runtime-apis/nodejs/#enable-nodejs-with-workers.
If the above guide fails to work, go to your **Cloudflare project > Settings > Functions > Compatibility flags** and add the flag (as follows).
#### Step 2. Opt out of bundling Node.js built-ins
Per [Astro + Cloudflare docs](https://docs.astro.build/en/guides/integrations-guide/cloudflare/#nodejs-compatibility), you'd need to modify the vite configuration to allow for the node:* import syntax:
```diff
// File: astro.config.mjs
import { defineConfig } from 'astro/config';
import cloudflare from '@astrojs/cloudflare';
// https://astro.build/config
export default defineConfig({
output: 'server',
adapter: cloudflare(),
+ vite: {
+ ssr: {
+ external: ["buffer", "path", "fs", "os", "crypto", "async_hooks"].map((i) => `node:${i}`),
+ },
+ // make sure to use node:fs, node:path, or node:os if you are using it in your project instead of fs, path or os
+ },
});
```
### Step 3. Use local fonts over CDN in case of Astro Server-Side Rendering with Cloudflare
As there's no access to the files in the `public` directory in the Cloudflare Pages (server-side render) context, you'd want to use fonts over CDN. To make the developer experience painless, use the following code snippet while setting up local fonts with Cloudflare in Astro:
```astro
---
import { join } from "node:path";
import { AstroFont } from "astro-font";
const fontPrefix = import.meta.env.PROD
? Astro.site.toString()
: join(process.cwd(), "public");
---
```
## Dynamically use fonts on CDN but serve them locally
Let us say you want to self host the fonts but do not want to spend time fetching the fonts, setting up the right path, and do the hassle of bundling it in the application. That is where you would want to do the following steps:
- Use the `fetch: true` in (per) font configuration. For example:
```astro
```
The `fetch: true` makes `astro-font` fetch the fonts specified.
- Update your `astro.config.*` file to include the `astroFont` integration:
```diff
// File: astro.config.mjs
+ import { astroFont } from 'astro-font/integration'
// ...
integrations: [
+ astroFont()
]
// ...
```
The integration makes sure that all the directories containing the fetched fonts are bundled into the Astro build.
## Contributing
We love our contributors! Here's how you can contribute:
- [Open an issue](https://github.com/rishi-raj-jain/astro-font/issues) if you believe you've encountered a bug.
- Make a [pull request](https://github.com/rishi-raj-jain/astro-font/pull) to add new features/make quality-of-life improvements/fix bugs.
## Repo Activity
