# vite plugin singlefile compression

Compress all assets and embeds them into `dist/index.html`, making it convenient to share as a single HTML file.

The recipient can open it directly in the browser without manually unzipping the file.

Using [DecompressionStream](https://developer.mozilla.org/en-US/docs/Web/API/DecompressionStream) + [base128-ascii](https://bddjr.github.io/base128/).

Preview: https://bddjr.github.io/vite-plugin-singlefile-compression/#/

## Setup

```
npm i -D vite-plugin-singlefile-compression@latest
```

Then modify `vite.config.ts`, like [website/vite.config.ts](website/vite.config.ts)

```diff
+ import singleFileCompression from 'vite-plugin-singlefile-compression'

  export default defineConfig({
    plugins: [
      vue(),
      vueDevTools(),
+     singleFileCompression(),
    ],
```

Then use hash history, like [website/src/router/index.ts](website/src/router/index.ts)

```diff
  const router = createRouter({
-   history: createWebHistory(),
+   history: createWebHashHistory(),
```

To automatically restore the user's scroll position after a page reload or back/forward navigation, add the following code to the end of `src/main.ts`:

```ts
// Restore scroll position after page reload or back/forward navigation
{
  const storageKey = 'globalScrollXY'
  const item = sessionStorage.getItem(storageKey)
  if (item !== null) {
    try {
      sessionStorage.removeItem(storageKey)
      const navEntry = self.performance.getEntriesByType('navigation')[0] as
        | PerformanceNavigationTiming
        | undefined
      const navType = navEntry?.type
      if (navType === 'reload' || navType === 'back_forward') {
        const [x, y] = item.split(',', 2)
        setTimeout(() => {
          self.scrollTo({
            left: Number(x),
            top: Number(y),
            behavior: 'instant',
          })
        }, 1)
      }
    } catch (e) {
      console.error(e)
    }
  }
  const saveScrollPosition = () => {
    sessionStorage.setItem(storageKey, `${self.scrollX},${self.scrollY}`)
  }
  self.addEventListener('pagehide', saveScrollPosition)
  document.addEventListener('visibilitychange', () => {
    if (document.visibilityState === 'hidden') saveScrollPosition()
  })
}
```

## Options

Example:

```ts
singleFileCompression({
  rename: 'example.html'
}),
```

### rename

Rename index.html

type: `string`

### enableCompress

Enable compress.

default: `true`

type: `boolean`

### useBase128

Use Base128 to encode compressed script.  
If false, use Base64.  
https://www.npmjs.com/package/base128-ascii

This option is only valid when the `enableCompress` option is set to true.

default: `true`

type: `boolean`

### compressFormat

Compress format.

https://developer.mozilla.org/en-US/docs/Web/API/DecompressionStream/DecompressionStream

This option is only valid when the `enableCompress` option is set to true.

default: `"deflate-raw"`

type:
 - `"deflate-raw"`
 - `"deflate"`
 - `"gzip"`
 - `"brotli"`
 - `"zstd"`
 - `"deflateRaw"`
 - `"gz"`
 - `"br"`
 - `"brotliCompress"`
 - `"zstandard"`
 - `"zst"`

### compressor

Custom compressor.

This option is only valid when the `enableCompress` option is set to true.

type: `(script: string) => (Uint8Array | Promise<Uint8Array>)`

### htmlMinifierTerser

https://github.com/terser/html-minifier-terser?tab=readme-ov-file#options-quick-reference

default: `defaultHtmlMinifierTerserOptions`

type:
 - `HtmlMinifierOptions`
 - `boolean`

### tryInlineHtmlAssets

Try inline html used assets, if inlined or not used in JS.

default: `true`

type: `boolean`

### removeInlinedAssetFiles

Remove inlined asset files.

default: `true`

type: `boolean`

### tryInlineHtmlPublicIcon

Try inline html favicon, if icon is in public dir.

default: `true`

type: `boolean`

### removeInlinedPublicIconFiles

Remove inlined html favicon files.

default: `true`

type: `boolean`

### enableCompressInlinedIcon

Enable compress inlined html favicon.

This option is only valid when the `enableCompress` option is set to true.

⚠️ Not works on Safari (See [#20](https://github.com/bddjr/vite-plugin-singlefile-compression/issues/20))

default: `false`

type: `boolean`

### useImportMetaPolyfill

Use import.meta polyfill.

default: `false`

type: `boolean`

### quiet

Do not log.

default: `false`

type: `boolean`

## Effect

Preview: https://bddjr.github.io/vite-plugin-singlefile-compression/#/

```
vite v8.0.16 building client environment for production...
✓ 43 modules transformed.
rendering chunks (1)...

vite-plugin-singlefile-compression 2.4.8 deflate-raw base128-ascii

  file:///D:/code/js/vite-plugin-singlefile-compression/website/dist/index.html
  130.041 kB -> 61.141 kB

Finish.

computing gzip size...
dist/index.html  61.14 kB │ gzip: 45.99 kB

✓ built in 330ms
```

## Clone

```
git clone https://github.com/bddjr/vite-plugin-singlefile-compression
cd vite-plugin-singlefile-compression
pnpm i
pnpm build
```