HarmonyOS 鸿蒙Next Web组件点击tel:类型超链接后白屏，未唤起拨打电话

import web_webview from '@ohos.web.webview'; 
import call from '@ohos.telephony.call'; 
import { BusinessError } from '@ohos.base'; 

@Entry 
@Component 
struct WebComponent { 
    webviewController: web_webview.WebviewController = new web_webview.WebviewController(); 

    build() { 
        Column() { 
            Web({ src: $rawfile('call.html'), controller: this.webviewController}) 
            .onLoadIntercept((event) => { 
                if (event) { 
                    let url: string = event.data.getRequestUrl(); 
                    // 判断链接是否为拨号链接 
                    if (url.indexOf('tel://') === 0) { 
                        call.makeCall(url.substring(6),(err: BusinessError) => { 
                            if (!err) { 
                                console.log("make call success."); 
                            } else { 
                                console.log("make call fail, err is:" + JSON.stringify(err)); 
                            } 
                        }); 
                        return true; 
                    } 
                } 
                return false; 
            }) 
        } 
    }
}