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vite-plugin-svelte-ssr-hot

v8.0.2

Published

Compile Svelte components with Vite

Downloads

9

Readme

vite-plugin-svelte-ssr-hot

Compile Svelte components for Vite. Forks from the official rollup-plugin-svelte. Supports HMR (Hot Module Replacement) and SSR (Server-Side Rendering).

Installation

npm install --save-dev svelte vite-plugin-svelte-ssr-hot

Note that we need to install Svelte as well as the plugin, as it's a 'peer dependency'.

Usage

// vite.config.js
import svelte from 'vite-plugin-svelte-ssr-hot';

export default ({ command }) => {
  const isDev = command === 'serve';

  return {
    plugins: [
      svelte({
        hot: isDev,

        compilerOptions: {
          hydratable: true // true for SSR, false for CSR (Client-Side Rendering)
          // `generate` option will be auto set.
        }
      })
    ],
    
    resolve: {
      dedupe: ['svelte']
    },

    ssr: {
      external: ['svelte']
    },

    optimizeDeps: {
      exclude: ['svelte']
    }
  };
};

Preprocessing and dependencies

If you are using the preprocess feature, then your callback responses may — in addition to the code and map values described in the Svelte compile docs — also optionally include a dependencies array. This should be the paths of additional files that the preprocessor result in some way depends upon. In Rollup 0.61+ in watch mode, any changes to these additional files will also trigger re-builds.

pkg.svelte

If you're importing a component from your node_modules folder, and that component's package.json has a "svelte" property...

{
  "name": "some-component",

  // this means 'some-component' resolves to 'some-component/src/SomeComponent.svelte'
  "svelte": "src/MyComponent.svelte"
}

...then this plugin will ensure that your app imports the uncompiled component source code. That will result in a smaller, faster app (because code is deduplicated, and shared functions get optimized quicker), and makes it less likely that you'll run into bugs caused by your app using a different version of Svelte to the component.

Conversely, if you're publishing a component to npm, you should ship the uncompiled source (together with the compiled distributable, for people who aren't using Svelte elsewhere in their app) and include the "svelte" property in your package.json.

If you are publishing a package containing multiple components, you can create an index.js file that re-exports all the components, like this:

export { default as Component1 } from './Component1.svelte';
export { default as Component2 } from './Component2.svelte';

and so on. Then, in package.json, set the svelte property to point to this index.js file.

License

MIT