页面正在卸载错误 [英] `the page is being unloaded` error
问题描述
我正在使用NodeJS-ReactJS同构应用程序，当我单击 Link 时，我收到一个错误提示
I was working with a NodeJS-ReactJS Isomorphic App, and when I click on a Link I'm getting an error saying
未捕获（承诺）错误：请求已终止
可能的原因：网络处于脱机状态，Access-Control-Allow-Origin不允许起源，页面正在卸载等。
我听说的前两个原因（脱机和CORS）。 页面正在卸载错误是什么意思？
The first two reasons (offline and CORS) I heard about. What is the the page is being unloaded error means? How it may cause the browser not navigating to need.
推荐答案
您的错误是
Uncaught (in promise) Error: Request has been terminated
此错误是在promise中的请求在解决或拒绝之前终止时引起的。如果（可能原因）
This error is caused when the request in the promise is terminated before it is resolved or rejected. This can happen if (Possible causes)
-
网络处于脱机状态：存在网络故障，与用于处理请求的网址的连接已丢失。 -
Access-Control-Allow-Origin不允许起源：由于缺少适当的CORS标头，因此请求被拒绝。 / li>
-
正在卸载页面：发出请求的页面在请求完成之前关闭。
the network is offline: There is a network failure and the connection to the url using which the request was being processed is lost.Origin is not allowed by Access-Control-Allow-Origin: The request is rejected due to absence of proper CORS headers.the page is being unloaded: The page making the request is closed before the request completed.
在上述原因中，与您的案件相关的最可能原因是1或2，因为在单击 Link <时出现错误/ code>导航到组件。请检查正在使用 Link 加载的新组件发出的请求。
Of the above reasons, the most probable cause relevant to your case would be either 1 or 2, since you get the error on clicking a Link to navigate to a component. Please check the requests being made by the new component that is being loaded using the Link.
编辑：
如果您查看错误消息的截屏，它清楚地表明该错误发生在行号。在node_modules / superagent / lib / client.js.Request.crossDomainError中的PromiseRequest处的app.js的73194。因此，导致您出错的原因是上面第2条中所述的CORS错误。
If you look at the error message screen shot, it clearly states that the error occured at line no. 73194 of app.js at PromiseRequest in node_modules/superagent/lib/client.js.Request.crossDomainError. So the reason for your error is a CORS error which is described in number 2 above.
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