Replacing prototype while setting objects

[Otouto]

I`ve found weird behaviour in vue version >= 0.10.0:

new Vue({
    created: function() {
        console.log(moment()); //__proto__: Moment
        this.now = moment();
        console.log(this.now); //__proto__: Object
    }
})

why object`s prototype get replaced?

[yyx990803]

Vue swaps observed data object's __proto__ property for faster method augmentations. In 0.11 you can turn off this behavior with Vue.config.proto = false.

[Otouto]

In 0.11 you can turn off this behavior

It would be nice. Thanks for clarification.