问题
I'm having difficulties implementing something simple: I have an index.html file served on http://localhost:3200 by ruby on rails, which uses a javascript file served on http://localhost:8000 by webpack-dev-server.
So here's what I have:
<!doctype html>
<head>
<script crossorigin="anonymous" src="http://localhost:8000/app.js" />
</head>
<!-- ... -->
</html>
My app.js file is sent with, amongst others, the following header:
Access-Control-Allow-Origin: *
What I want is to be able to override window.onerror in app.js, and see caught errors, rather than "Script error".
What am I missing?
-- edit -- Since it might not be clear enough: my script does load. I have no problem with that. My issue is that I need to report errors that happen to somewhere else, but I can't do that since any error that occurs in app.js is reported as "Script error" rather than something more explicit.
回答1:
What sourcemap (devtool) are you using?
I was getting this issue, and it changing from eval-source-map to source-map fixed it.
回答2:
This is a google chrome issue, should be when Chrome 71 is released.
Here are the relevant issue threads:
https://bugs.chromium.org/p/chromium/issues/detail?id=765909
https://github.com/webpack/webpack/issues/5681
Edit: This also impacts electron users.
来源：https://stackoverflow.com/questions/41982501/fixing-js-script-error