`instanceof` & `typeof` inside templates break syntax highlighting for the rest of the file

[WofWca]

• [x] I have searched through existing issues
• [x] I have read through docs
• [x] I have read FAQ

Info

• Platform: Win
• Vetur version: 0.24.0
• VS Code version: 1.44.1

Problem

Using instanceof inside templates breaks syntax highlighting.

Reproducible Case

<template>
  <p v-show="p instanceof Array"></p>
</template>

[JoelFeiner]

A good and reasonable workaround would be to use a computed property instead, rather than have interesting logic inside the template.

[toshiya14]

I am facing the same issue, and I found an resolution is below:

<span v-if="!!(item.createdTime instanceof Date)"></span>

I think this would help you before the issue is fixed.

[Eternal-Rise]

same issue with typeof

[liplum]

I can reproduce this in Volar too. My solution is to wrap the expression with parentheses.

<template v-if="(file instanceof LocalFile)">