Why drag/drop doesn't work correctly?

Question

Vue.js

If you drag the list, we see that the data is successfully sorted, and the display is reset for some reason. What's wrong? https://codesandbox.io/s/lr7qn866oz
If you remove the actual sorting itself, then everything is displayed OK

this.$emit('input', move(this.items, oldIndex, newIndex))

Answer 1

Because the key of the curve is tied to the index. Make it match the real data - everything will be OK .