Analysis: the reason for uncaught (in promise) cancel is that. Catch () cannot be removed from the built-in promise method of this. $confirm method, and cannot be captured without. Catch cancellation operation.
the usage of error is as follows:
The console reports the following errors:
The correct usage is as follows:
Error screenshot:
wrong reason:
The index value type of the menu component in element-ui must be a string type. I bound the index property and assigned it to a num value type, so an error was reported.
<el- submenu
:index ="index + 1"
:key ="index"
v - for ="(item, index) in menus"></el-submenu>
solution:
Just change the value of the :index attribute to a string type,
<el- submenu
:index ="index + 1 +''"
:key ="index"
v - for ="(item, index) in menus"></el-submenu>
Perfect solution:
