HarmonyOS Web管理Cookie和数据存储

import web_webview from '@ohos.web.webview'; 
import business_error from '@ohos.base'; 
@Entry 
@Component 
struct CookiePage { 
  controller: web_webview.WebviewController = new web_webview.WebviewController(); 
  build() { 
    Column() { 
      Button('configCookieSync') 
        .onClick(() => { 
          try { 
            //设置指定url对应cookie 
            web_webview.WebCookieManager.configCookieSync('https://m.baidu.com', 'value=test'); 
            //获取指定url对应cookie的值 
            web_webview.WebCookieManager.fetchCookie('https://m.baidu.com',(err,value) =>{ 
              if (err) { 
                console.log(`${err}`) 
              } 
              console.log(value); 
            }) 
          } catch (error) { 
            let e: business_error.BusinessError = error as business_error.BusinessError; 
            console.error(`ErrorCode: ${e.code},  Message: ${e.message}`); 
          } 
        }) 
      Button('saveCookieAsync') 
        .onClick(() => { 
          try { 
            //将当前存在内存中的cookie异步保存到磁盘中 
            web_webview.WebCookieManager.saveCookieAsync((error) => { 
              if (error) { 
                let e: business_error.BusinessError = error as business_error.BusinessError; 
                console.error(`ErrorCode: ${e.code},  Message: ${e.message}`); 
              } 
            }) 
          } catch (error) { 
            let e:business_error.BusinessError = error as business_error.BusinessError; 
            console.error(`ErrorCode: ${e.code},  Message: ${e.message}`); 
          } 
        }) 
      Button('existCookie') 
        .onClick(() => { 
          //判断是否存在cookie 
          let result = web_webview.WebCookieManager.existCookie(); 
          console.log("result: " + result); 
        }) 
 
      Button('clearAllCookiesSync') 
        .onClick(() => { 
          //清楚所有的cookie 
          web_webview.WebCookieManager.clearAllCookiesSync(); 
        }) 
 
      Button('removeCache') 
        .onClick(() => { 
          try { 
            // 设置为true时同时清除rom和ram中的缓存，设置为false时只清除ram中的缓存 
            this.controller.removeC