Vue.js version

2.0.5

Reproduction Link

https://jsfiddle.net/tqwxk226/

Steps to reproduce

Switch between versions of Vue.js, and enter any text in the input

What is Expected?

Property update on input, like in Vue.js 1.0

What is actually happening?

When using Vue.js 2.0, the field changes to empty on input event (any key)