para-bridge-demo/src/client/modules/plugin_bar/set_webview_back/webview-back.md

a bridge api for js-ios/andriod rest

``` tsx
import { setWebviewBack } from '../../../plugins/bar/set-webview-back';

private setWebviewBack = () => {
  setWebviewBack();
}

private setWebviewBackTo = () => {
  setWebviewBack(2);
}

private setWebviewBack2Home = () => {
  setWebviewBack(100);
}

```