> For AI agents: the complete documentation index is available at https://rsdoctor.rs/llms.txt, the full documentation bundle is available at https://rsdoctor.rs/llms-full.txt.

# supports

- **Type:** [Supports Types](#supportstypes)
- **Optional:** `true`
- **Default:** `undefined`

This option controls bundle parsing and compressed size calculation.

## supportsTypes

```ts
type ISupport = {
  parseBundle?: boolean;
  brotli?: boolean | { brotliLevel?: number };
  gzip?:
    | boolean
    | {
        gzipLevel?: number;
      };
};
```

## parseBundle

- **Type:** `boolean`
- **Default:** `true`

Controls whether Rsdoctor uses AST parsing to analyze bundle code when source map data is unavailable.

AST parsing can take time in large projects. Set `supports.parseBundle` to `false` to skip this step:

```ts
new RsdoctorRspackPlugin({
  supports: {
    parseBundle: false,
  },
});
```

Disabling this option may leave modules that require AST parsing without Bundled Size or Bundled Code. Analysis based on source maps is unaffected.

To control which code is included in the report, use [output.reportCodeType](https://rsdoctor.rs/config/options/output.md#reportcodetype).


![](https://assets.rspack.rs/others/assets/rsdoctor/bundled-size.jpeg)![](https://assets.rspack.rs/others/assets/rsdoctor/bundled-code.png)

## gzip

- **Type:** `boolean | { gzipLevel?: number }`
- **Default:** `true`

Controls whether Rsdoctor calculates gzip sizes for assets and modules. This calculation only affects the size data in the Rsdoctor report; it does not modify or compress the build output.

Rsdoctor skips gzip size calculation while the compiler is running in watch mode. Run a one-time build when you need gzip sizes for production bundle analysis.

Gzip size calculation is enabled by default with a compression level of `6`. Set `gzip` to an object to customize `gzipLevel`, which must be an integer between `0` and `9`:

```ts
new RsdoctorRspackPlugin({
  supports: {
    gzip: {
      gzipLevel: 9,
    },
  },
});
```

Set `gzip` to `false` to disable gzip size calculation:

```ts
new RsdoctorRspackPlugin({
  supports: {
    gzip: false,
  },
});
```

## brotli

- **Type:** `boolean | { brotliLevel?: number }`
- **Default:** `false`

Calculates Brotli sizes for assets and modules in the report, including the size cards and treemap. This does not compress or modify build output. Like gzip, Brotli calculation is skipped in watch mode.

Set `brotli: true` or `brotli: {}` to use quality `6`, or specify `brotliLevel` as an integer from `0` to `11`. Higher levels can increase analysis time. Disable gzip independently when you only need Brotli sizes:

```ts
new RsdoctorRspackPlugin({
  supports: {
    gzip: false,
    brotli: { brotliLevel: 11 },
  },
});
```