Occurred error in 'set' and 'delete' utility functions

[kazupon]

we create the object with Object.create(null), and after that when we use Vue.util.set or Vue.util.delete, occur the following error at these functions.

TypeError: obj.hasOwnProperty is not a function. (In 'obj.hasOwnProperty(key)', 'obj.hasOwnProperty' is undefined)

Please see the following jsfiddle:
https://jsfiddle.net/kazupon/1b7nytcd/1/

This issue is related #1765

I fixed the this issue, and refactored.
Please check the PR!! 😸

[yyx990803]

Let's cache Object.prototype.hasOwnProperty outside the function because this is going to be called a lot.

[kazupon]

OK !!
Should I use the Cache ?
https://github.com/vuejs/vue/blob/dev/src/cache.js

[yyx990803]

No, what I mean is just hold it in a variable outside the function as var hasOwn = Object.prototype.hasOwnProperty
It probably doesn't make much difference, but saves two property lookups on every call ;)

[kazupon]

I see. :)

[yyx990803]

Thanks! A few notes:

1. The changes to v-model directives are unnecessary because those are Elements so they will always inherit from Object.prototype.
2. Let's rename it to _.hasOwn (shorter and smaller file size)

[kazupon]

Thank you for your many review!! :)

I'll try 💪

[kazupon]

Done.
Please check :)

[yyx990803]

Looks good! Can you squash them into one commit please?

[kazupon]

See the #1816 :)