ts(6133): never read in v-for if only using the index

[panwauu]

I use v-for sometimes for iterating using the index of an array. Normally in typescript I can use "_" to ignore the first parameter and only use the second one. Using Volar I always get an error.

<div v-for="(_, i) in ['a','b','c']">{{i}}</div>

'_' is declared but its value is never read.ts(6133)

Workarounds are:

<div v-for="(_, i) in ['a','b','c']">{{i}}</div> // Renders: 0 1 2; Leads to ts error
<div v-for="i in ['a','b','c'].length">{{i}}</div> // Renders: 1 2 3; Workaround a
<div v-for="i in [...Array(['a','b','c'].length).keys()]">{{i}}</div> // Renders: 0 1 2; Workaround b

Old issue: johnsoncodehk/vue-tsc#59

Related problem: #329
Here the issue is, that the variable is used in :key but volar does not recognize that it is actually used

[johnsoncodehk]

Thanks for the report!