[Vuejs]-Retrieve selected values from multi-select box in vue js

Just you have assigned drop down data wrongly , Need to change like below:

Little change in template:

<button v-else  @click="saveItem(program)">save</button>

and saveItem() method like below:

saveItem (program) {
     program.isReadOnly = true
     program.editable = false
     console.log(program)
     alert(program.dropDowns)
    }

The problem is that you are not passing anything to the saveItem function, so no program was being sent.

You just have to replace saveItem for saveItem(program) and that should do the trick.