How the input of iview retains the previous value

in the process of using iview"s input, the value bound by on-change is the changed value, how to get the data before it has not been changed? Because you need to make a comparison between the new value and the old value to determine whether to execute an event

Mar.31,2021

you can choose to directly change-value without v-model.


proxy the value of input, and use the set trap to change

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