javascript - Problems encountered when traversing arrays with Vue's v-for instruction

Question

I traversed like this:

But the browser gave this error:

It says that [index] cannot be found, which is the array index. Why is this?

Answer 1

The span tag should be written inside the li tag

Answer 2

The variable of v-for can only be used on the child elements of this tag

Answer 3

Have you read the documentation for vue class binding
https://cn.vuejs.org/v2/guide...

Answer 4

Don’t use seller.supports[index].type in the loop. Just use item.type directly.