# runtimePlugins

- Type: `string[]`
- Required: No
- Default: `undefined`

The `runtimePlugins` configuration is used to add additional plugins needed at runtime. The value should be the path to the specific plugin, which can be an absolute/relative path or a package name. You can learn more about how to develop `runtimePlugin` details by visiting the [Plugin System](../plugin/dev/index).

Once set, runtime plugins will be automatically injected and used during the build process.

- Examples

To create a runtime plugin file, you can name it `custom-runtime-plugin.ts`:

```ts title="custom-runtime-plugin.ts"
import { FederationRuntimePlugin } from '@module-federation/enhanced/runtime';

export default function (): FederationRuntimePlugin {
  return {
    name: 'custom-plugin-build',
    beforeInit(args) {
      console.log('[build time inject] beforeInit: ', args);
      return args;
    },
    beforeLoadShare(args) {
      console.log('[build time inject] beforeLoadShare: ', args);
      return args;
    },
  };
}
```

Then, apply this plugin in your build configuration:

```ts title="rspack.config.ts"
const path = require('path');
module.exports = {
  plugins: [
    new ModuleFederation({
      name: 'host',
      remotes: {
        'manifest-provider':
          'manifest_provider@http://localhost:3011/mf-manifest.json',
      },
      runtimePlugins: [path.resolve(__dirname, './custom-runtime-plugin.ts')],
    }),
  ],
};
```