Do you have a small partner with the same problem? After checking, no problematic JS code was found
Thanks to the answer, this problem should come up with the QQ browser itself, the breakpoint tracking error, and the QQ browser to judge the code format of a file in webpack, so report this error. There is no problem with the server after packing.
It is estimated that the new syntax of Es5 is not recognized by QQ browser.
A detailed look at the problem needs to look at the source code.
You click login.vue to see what the wrong code is.