Element UI event callback function data pass parameter, pass default parameter and custom parameter resolution

Problem: When using element UI components, event callbacks have default parameters and you want to add custom attributes.

The solution

The default argument to the change event is the select bound V-Model data as an argument to the callback function, If you want to add a custom parameter,change(‘ custom ‘) will override the default parameter, so change(‘ custom ‘, $event)

This is also often encountered but will also be ignored, here to record, good memory is better than bad writing.