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import web_webview from '@ohos.web.webview' 
import Url from '@ohos.url' 
@Entry 
@Component 
struct Index { 
  controller: web_webview.WebviewController = new web_webview.WebviewController() 
  url: string = ''; 
  @State message:string = ''; 
  build() { 
    Column() { 
      Text(this.message) 
        .fontColor('#2EB3FF') 
        .fontSize('36px') 
 
      Button('后退') 
        .onClick(()=>{ 
          if(this.controller.accessBackward()){ 
            this.message = '可继续后退~'; 
            this.controller.backward(); 
          }else{ 
            this.message = '不可以继续后退了~'; 
          } 
        }) 
        .margin({top:'20vp',bottom:'20vp'}) 
 
      Button('前进') 
        .onClick(()=>{ 
          if(this.controller.accessForward()){ 
            this.message = '可以继续前进~'; 
            this.controller.forward(); 
          }else{ 
            this.message = '不可以继续前进了！' 
          } 
        }) 
        .margin({bottom:'20vp'}) 
 
      Web({ src: 'https://www.huawei.com', controller: this.controller }) 
        .onControllerAttached(()=>{ 
          this.controller.loadUrl('https://www.huawei.com',[{ headerKey: "Accept", headerValue: "*" }]) 
        }) 
        .domStorageAccess(true) 
        .expandSafeArea([SafeAreaType.CUTOUT], [SafeAreaEdge.TOP, SafeAreaEdge.BOTTOM]) 
        .backgroundColor(Color.Red) 
    } 
  } 
 
}