使用postmessage报错，Failed to execute 'postMessage' on

Question

使用postMessage发送跨域消息，window.postMessage('hello there!', location.protocol + '//a.b.com');但是报了下面的错误：Failed to execute 'postMessage' on 'DOMWindow': The target origin provided ('http://a.b.com') does not match the recipient window's origin ('http://c.e.com')请问是什么原因？

Answer 1

otherWindow.postMessage(message, targetOrigin, [transfer]);
otherWindow:其他窗口的一个引用，比如iframe的contentWindow属性、执行window.open返回的窗口对象、或者是命名过或数值索引的window.frames。
otherWindow不能是当前窗口哦
参见MDN