webapp js与安卓，ios怎么交互

/*这段代码是固定的，必须要放到js中*/
function setupWebViewJavascriptBridge(callback) {

var u = navigator.userAgent;
var isiOS = !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/);
if (!isiOS) {
if (window.WebViewJavascriptBridge) {
          callback(WebViewJavascriptBridge)
      } else {
document.addEventListener('WebViewJavascriptBridgeReady', function (event) {
if(window.onWebViewJavascriptBridgeReady) window.onWebViewJavascriptBridgeReady(window.__bridge = WebViewJavascriptBridge);
              callback(WebViewJavascriptBridge)
          }, false)
      }
  } else {

if (window.WebViewJavascriptBridge) {
return callback(WebViewJavascriptBridge);
      }
if (window.WVJBCallbacks) {
return window.WVJBCallbacks.push(callback);
      }
window.WVJBCallbacks = [callback];
var WVJBIframe = document.createElement('iframe');
WVJBIframe.style.display = 'none';
WVJBIframe.src = 'wvjbscheme://__BRIDGE_LOADED__';
document.documentElement.appendChild(WVJBIframe);
setTimeout(function() {
document.documentElement.removeChild(WVJBIframe)
      }, 0)
  }

}

export default {

callhandler (name, data, callback) {
setupWebViewJavascriptBridge(function (bridge) {
      bridge.callHandler(name, data, callback)
    })
  },

registerhandler (name, callback) {
setupWebViewJavascriptBridge(function (bridge) {
      bridge.registerHandler(name, function (data, responseCallback) {
        callback(data, responseCallback)
      })
    })
  }
}
// 调用

this.$bridge.callhandler('shopCode',{'test':'test'},(data) => {
this.shopCode = data.shopCode;
})