How to change local variable in vue for?

Question

Vue.js

<td class="text-center  no-wrap pa-2">
                        {{ localVar + 1234 }} // Value added always to 0, output always = 1234
// or
                        {{ localVar += 1234 }} // ERROR! infinite loop
                    </td>

data:       () => (
            {
                localVar: 0,

Answer 1

No way. There should be no data changes in the View layer. Fundamentally.
Read about MVVM .