How to get array key in a loop at the vue v-for?

Is the object data:
data: {
key1: value1,
key2: value2,

The formation of the DOM:
the <ul>
 <li :some-data="key" v-for="item in data">{{item}}</li>

As is key :some-data="key" paste the values from the data (key1, key2,...)?
June 3rd 19 at 19:08
1 answer
June 3rd 19 at 19:10
In the documentation did not try to look?

<li :some-data="key" v-for="(item, key) in data">{{item}}</li>

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