diff --git a/dist/uni.webview.1.5.2.js b/dist/uni.webview.1.5.2.js
index 8708892fdac3cba7ce02c592b66cc97201ae232c..1b2421df647d91edbdbfeb982e4c3759ef1d4c61 100644
--- a/dist/uni.webview.1.5.2.js
+++ b/dist/uni.webview.1.5.2.js
@@ -1 +1 @@
-!function(e,n){"object"==typeof exports&&"undefined"!=typeof module?module.exports=n():"function"==typeof define&&define.amd?define(n):(e=e||self).uni=n()}(this,function(){"use strict";function i(e,n){var i={options:{timestamp:+new Date},name:e,arg:n};if(window.__dcloud_weex_postMessage||window.__dcloud_weex_){if("postMessage"===e){var t={data:[n]};return window.__dcloud_weex_postMessage?window.__dcloud_weex_postMessage(t):window.__dcloud_weex_.postMessage(JSON.stringify(t))}var o={type:c,args:{data:i,webviewIds:w}};window.__dcloud_weex_postMessage?window.__dcloud_weex_postMessageToService(o):window.__dcloud_weex_.postMessageToService(JSON.stringify(o))}if(!window.plus)return window.parent.postMessage({type:c,data:i,pageId:""},"*");if(0===w.length){var a=plus.webview.currentWebview();if(!a)throw new Error("plus.webview.currentWebview() is undefined");var d=a.parent(),r="";r=d?d.id:a.id,w.push(r)}if(plus.webview.getWebviewById(u))plus.webview.postMessageToUniNView({type:c,args:{data:i,webviewIds:w}},u);else{var s=JSON.stringify(i);plus.webview.getLaunchWebview().evalJS('UniPlusBridge.subscribeHandler("'.concat(c,'",').concat(s,",").concat(JSON.stringify(w),");"))}}var w=[],u="__uniapp__service",c="WEB_INVOKE_APPSERVICE",n={navigateTo:function(e){var n=(0<arguments.length&&void 0!==e?e:{}).url;i("navigateTo",{url:encodeURI(n)})},navigateBack:function(e){var n=(0<arguments.length&&void 0!==e?e:{}).delta;i("navigateBack",{delta:parseInt(n)||1})},switchTab:function(e){var n=(0<arguments.length&&void 0!==e?e:{}).url;i("switchTab",{url:encodeURI(n)})},reLaunch:function(e){var n=(0<arguments.length&&void 0!==e?e:{}).url;i("reLaunch",{url:encodeURI(n)})},redirectTo:function(e){var n=(0<arguments.length&&void 0!==e?e:{}).url;i("redirectTo",{url:encodeURI(n)})},getEnv:function(e){window.plus?e({plus:!0}):e({h5:!0})},postMessage:function(e){i("postMessage",(0<arguments.length&&void 0!==e?e:{}).data||{})}},t=/uni-app/i.test(navigator.userAgent),o=/complete|loaded|interactive/;var a=window.my&&-1<navigator.userAgent.indexOf("AlipayClient");var d=window.swan&&window.swan.webView&&/swan/i.test(navigator.userAgent);var r=window.qq&&window.qq.miniProgram&&/QQ/i.test(navigator.userAgent)&&/miniProgram/i.test(navigator.userAgent);var s=window.tt&&window.tt.miniProgram&&/toutiaomicroapp/i.test(navigator.userAgent);var g=window.wx&&window.wx.miniProgram&&/micromessenger/i.test(navigator.userAgent)&&/miniProgram/i.test(navigator.userAgent);for(var e,v=function(){window.UniAppJSBridge=!0,document.dispatchEvent(new CustomEvent("UniAppJSBridgeReady",{bubbles:!0,cancelable:!0}))},p=[function(e){if(t)return window.__dcloud_weex_postMessage||window.__dcloud_weex_?document.addEventListener("DOMContentLoaded",e):window.plus&&o.test(document.readyState)?setTimeout(e,0):document.addEventListener("plusready",e),n},function(e){if(g)return window.WeixinJSBridge&&window.WeixinJSBridge.invoke?setTimeout(e,0):document.addEventListener("WeixinJSBridgeReady",e),window.wx.miniProgram},function(e){if(r)return window.QQJSBridge&&window.QQJSBridge.invoke?setTimeout(e,0):document.addEventListener("QQJSBridgeReady",e),window.qq.miniProgram},function(e){if(a){document.addEventListener("DOMContentLoaded",e);var n=window.my;return{navigateTo:n.navigateTo,navigateBack:n.navigateBack,switchTab:n.switchTab,reLaunch:n.reLaunch,redirectTo:n.redirectTo,postMessage:n.postMessage,getEnv:n.getEnv}}},function(e){if(d)return document.addEventListener("DOMContentLoaded",e),window.swan.webView},function(e){if(s)return document.addEventListener("DOMContentLoaded",e),window.tt.miniProgram},function(e){return document.addEventListener("DOMContentLoaded",e),n}],l=0;l<p.length&&!(e=p[l](v));l++);e=e||{};var f="undefined"!=typeof uni?uni:{};return f.navigateTo?f.webView=e:Object.assign(f,e,{webView:e}),f});
+!function(e,n){"object"==typeof exports&&"undefined"!=typeof module?module.exports=n():"function"==typeof define&&define.amd?define(n):(e=e||self).uni=n()}(this,function(){"use strict";function i(e,n){var i={options:{timestamp:+new Date},name:e,arg:n};if(window.__dcloud_weex_postMessage||window.__dcloud_weex_){if("postMessage"===e){var t={data:[n]};return window.__dcloud_weex_postMessage?window.__dcloud_weex_postMessage(t):window.__dcloud_weex_.postMessage(JSON.stringify(t))}var o={type:c,args:{data:i,webviewIds:w}};window.__dcloud_weex_postMessage?window.__dcloud_weex_postMessageToService(o):window.__dcloud_weex_.postMessageToService(JSON.stringify(o))}if(!window.plus)return window.parent.postMessage({type:c,data:i,pageId:""},"*");if(0===w.length){var a=plus.webview.currentWebview();if(!a)throw new Error("plus.webview.currentWebview() is undefined");var d=a.parent(),r="";r=d?d.id:a.id,w.push(r)}if(plus.webview.getWebviewById(u))plus.webview.postMessageToUniNView({type:c,args:{data:i,webviewIds:w}},u);else{var s=JSON.stringify(i);plus.webview.getLaunchWebview().evalJS('UniPlusBridge.subscribeHandler("'.concat(c,'",').concat(s,",").concat(JSON.stringify(w),");"))}}var w=[],u="__uniapp__service",c="WEB_INVOKE_APPSERVICE",n={navigateTo:function(e){var n=(0<arguments.length&&void 0!==e?e:{}).url;i("navigateTo",{url:encodeURI(n)})},navigateBack:function(e){var n=(0<arguments.length&&void 0!==e?e:{}).delta;i("navigateBack",{delta:parseInt(n)||1})},switchTab:function(e){var n=(0<arguments.length&&void 0!==e?e:{}).url;i("switchTab",{url:encodeURI(n)})},reLaunch:function(e){var n=(0<arguments.length&&void 0!==e?e:{}).url;i("reLaunch",{url:encodeURI(n)})},redirectTo:function(e){var n=(0<arguments.length&&void 0!==e?e:{}).url;i("redirectTo",{url:encodeURI(n)})},getEnv:function(e){window.plus?e({plus:!0}):e({h5:!0})},postMessage:function(e){i("postMessage",(0<arguments.length&&void 0!==e?e:{}).data||{})}},t=/uni-app/i.test(navigator.userAgent),o=/complete|loaded|interactive/;var a=window.my&&-1<navigator.userAgent.indexOf("AlipayClient");var d=window.swan&&window.swan.webView&&/swan/i.test(navigator.userAgent);var r=window.qq&&window.qq.miniProgram&&/QQ/i.test(navigator.userAgent)&&/miniProgram/i.test(navigator.userAgent);var s=window.tt&&window.tt.miniProgram&&/toutiaomicroapp/i.test(navigator.userAgent);var g=window.wx&&window.wx.miniProgram&&/micromessenger/i.test(navigator.userAgent)&&/miniProgram/i.test(navigator.userAgent);for(var e,v=function(){window.UniAppJSBridge=!0,document.dispatchEvent(new CustomEvent("UniAppJSBridgeReady",{bubbles:!0,cancelable:!0}))},p=[function(e){if(t)return window.__dcloud_weex_postMessage||window.__dcloud_weex_?document.addEventListener("DOMContentLoaded",e):window.plus&&o.test(document.readyState)?setTimeout(e,0):document.addEventListener("plusready",e),n},function(e){if(g)return window.WeixinJSBridge&&window.WeixinJSBridge.invoke?setTimeout(e,0):document.addEventListener("WeixinJSBridgeReady",e),window.wx.miniProgram},function(e){if(r)return window.QQJSBridge&&window.QQJSBridge.invoke?setTimeout(e,0):document.addEventListener("QQJSBridgeReady",e),window.qq.miniProgram},function(e){if(a){document.addEventListener("DOMContentLoaded",e);var n=window.my;return{navigateTo:n.navigateTo,navigateBack:n.navigateBack,switchTab:n.switchTab,reLaunch:n.reLaunch,redirectTo:n.redirectTo,postMessage:n.postMessage,getEnv:n.getEnv}}},function(e){if(d)return document.addEventListener("DOMContentLoaded",e),window.swan.webView},function(e){if(s)return document.addEventListener("DOMContentLoaded",e),window.tt.miniProgram},function(e){return document.addEventListener("DOMContentLoaded",e),n}],l=0;l<p.length&&!(e=p[l](v));l++);e=e||{};var f="undefined"!=typeof uni?uni:{};if(!f.navigateTo)for(var _ in e)e.hasOwnProperty(_)&&(f[_]=e[_]);return f.webView=e,f});
diff --git a/src/core/runtime/web-view/index.js b/src/core/runtime/web-view/index.js
index 35472e9923d6c8e7bbd7bd92eac6d4911eda0d21..e957da49b64661b59dc50c1927e657a87784cc80 100644
--- a/src/core/runtime/web-view/index.js
+++ b/src/core/runtime/web-view/index.js
@@ -52,12 +52,13 @@ if (!webViewApi) {
 
 const api = typeof uni !== 'undefined' ? uni : {}
 
-if (api.navigateTo) {
-  api.webView = webViewApi
-} else {
-  Object.assign(api, webViewApi, {
-    webView: webViewApi
-  })
+if (!api.navigateTo) {
+  for (const key in webViewApi) {
+    if (webViewApi.hasOwnProperty(key)) {
+      api[key] = webViewApi[key]
+    }
+  }
 }
+api.webView = webViewApi
 
 export default api