Vue version

3.2.47

Link to minimal reproduction

https://github.com/kinfuy/vue-template-bug

Steps to reproduce

<template>
  <div v-show="false">
     {{ text = ['1,2,3,4,5'] }}
  </div>
  <div>{{ text }}</div>

</template>

What is expected?

text not found

What is actually happening?

text normal operation

System Info

No response

Any additional comments?

No response

I think this isn't a bug. Vue3 is the same presentation form as Vue2.

https://stackblitz.com/edit/vue2-vue-cli-d2v8f6?file=src/App.vue

I think this isn't a bug too. {{ text = ['1,2,3,4,5'] }} is compiled by the compiler into code text.value = ['1,2,3,4,5'], and rendered run when. And v-show just controls the display property. text.value = ['1,2,3,4,5'] will still execute, which I think is expected

I think this kind of feeling is a little dark magic. Declare variables in the template, and they are valid in the entire template. This vue2 has the same effect. I'm not sure if it needs to be modified @AlexVagrant @baiwusanyu-c

You are modifying data while rendering the component so this is expected behavior. Currently you are not supposed to declare variable inside templates.