Uncaught DOMException: Blocked a frame with origin null from accessing a cross-origin frame.

Uncaught DOMException: Blocked a frame with origin “null” from accessing a cross-origin frame.

html1引入弹窗html2,点击关闭按钮报错如下：

跨页面操作涉及域的概念（origin）。
错误的意思是：
未捕获的安全错误：阻止了一个域为null的frame页面访问另一个域为null的页面，在本地直接用浏览器打开的、地址栏是file:///的页面。
解决方法：放到服务器上访问正常。
如下：
http://127.0.0.1:8020/drinkingWater/drinkWater/emergencyManage.html?__hbt=1533978846064

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Uncaught DOMException: Blocked a frame with origin null from accessing a cross-origin frame.

Uncaught DOMException: Blocked a frame with origin “null” from accessing a cross-origin frame.

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