A vite plugin to allow you to use vite as node dev server.
esbuild
or swc
to compile your typescript filesInstall vite and this plugin with your favorite package manager, here use npm as example:
npm install vite vite-plugin-node -D
Create a vite.config.ts
file in your project root to config vite to actually use this plugin:
import { defineConfig } from 'vite';
import { VitePluginNode } from 'vite-plugin-node';
export default defineConfig({
// ...vite configures
server: {
// vite server configs, for details see [vite doc](https://vitejs.dev/config/#server-host)
port: 3000
},
plugins: [
...VitePluginNode({
// Nodejs native Request adapter
// currently this plugin support 'express', 'nest', 'koa' and 'fastify' out of box,
// you can also pass a function if you are using other frameworks, see Custom Adapter section
adapter: 'express',
// tell the plugin where is your project entry
appPath: './app.ts',
// Optional, default: 'viteNodeApp'
// the name of named export of you app from the appPath file
exportName: 'viteNodeApp',
// Optional, default: false
// if you want to init your app on boot, set this to true
initAppOnBoot: false,
// Optional, default: 'esbuild'
// The TypeScript compiler you want to use
// by default this plugin is using vite default ts compiler which is esbuild
// 'swc' compiler is supported to use as well for frameworks
// like Nestjs (esbuild dont support 'emitDecoratorMetadata' yet)
// you need to INSTALL `@swc/core` as dev dependency if you want to use swc
tsCompiler: 'esbuild',
// Optional, default: {
// jsc: {
// target: 'es2019',
// parser: {
// syntax: 'typescript',
// decorators: true
// },
// transform: {
// legacyDecorator: true,
// decoratorMetadata: true
// }
// }
// }
// swc configs, see [swc doc](https://swc.rs/docs/configuration/swcrc)
swcOptions: {}
})
],
optimizeDeps: {
// Vite does not work well with optionnal dependencies,
// you can mark them as ignored for now
// eg: for nestjs, exlude these optional dependencies:
// exclude: [
// '@nestjs/microservices',
// '@nestjs/websockets',
// 'cache-manager',
// 'class-transformer',
// 'class-validator',
// 'fastify-swagger',
// ],
},
});
Update your server entry to export your app named viteNodeApp
or the name you configured.
const app = express();
// your beautiful code...
if (import.meta.env.PROD)
app.listen(3000);
export const viteNodeApp = app;
Add a npm script to run the dev server:
"scripts": {
"dev": "vite"
},
Run the script! npm run dev
If your favorite framework not supported yet, you can either create an issue to request it or use the adapter
option to tell the plugin how to pass down the request to your app. You can take a look how the supported frameworks implementations from the ./src/server
folder.
Example:
import { defineConfig } from 'vite';
import { VitePluginNode } from 'vite-plugin-node';
export default defineConfig({
plugins: [
...VitePluginNode({
adapter({ app, server, req, res, next }) {
app(res, res);
},
appPath: './app.ts'
})
]
});
This plugin leverages Vite SSR mode to build your app. All you need to do is add a build script to your package.json:
"scripts": {
"build": "vite build"
},
For more build config please check vite doc
Note: By default, starting from vite v3, the ssr buildle will be in esm format. if you want to build cjs, add
ssr: { format: 'cjs' }
to your vite config.
See the examples folder.
While frontend development tooling is evolving rapidly in recent years, backend DX is still like in stone age. No hot module replacement; Typescript recompiling slow as funk; Lack of plugin system etc. Thanks to Vite.js created by Evan You (A.K.A creator of vue.js; my biggest idol developer), makes all those dreams for backend development come true!
Vite by design has a middleware mode, which allows us to use it programmatically inside other modules. It's originally made for SSR, so that for each request, vite can load the renderer and render the latest changes you made to your app (https://vitejs.dev/guide/ssr.html). This plugin leverages this feature to load and execute your server app entry.
You may ask, isn't super slow, since it re-compiles/reloads the entire app? The answer is NO, because vite is smart. It has a builtin module graph as a cache layer, the graph is built up the first time your app loads. After that, when you update a file, vite will only invalidate that one and its parent modules, so that for next request, only those invalidated modules need to be re-compiled which is super fast thanks to esbuild or swc.
As this plugin just fresh developed, there are still lots ideas need to be implemented, including:
Please create an issue if you found any bugs, to help me improve this project!