domProps has twice the "value" key

[FranckFreiburger]

Version

2.5.2

Reproduction link

https://jsfiddle.net/50wL7mdz/71920/

Steps to reproduce

run the jsfiddle program and look at the textarea content, more precisely the last "domProps"

What is expected?

do not generate same key twice

What is actually happening?

... .domProps:{"value":'foo',"value":(model)} ...

---

This will rise an error in strict mode.
The JSFiddle example don't rise the error because it not in strict mode.
I have discovered the issue using webpack + babel + test on IE11

[yyx990803]

v-model expands to a value binding, it doesn't make sense to use it and an explicit value binding side by side.

[FranckFreiburger]

Ok thanks.
Just note that in my example:

 <input
    :type="'radio'"
    v-model="model"
    :value="'foo'"
  >

If I replace dynamic type :type="'radio'" with static type type="radio", everything is ok, is it expected ?

[yyx990803]

Yes, because v-model expands into different props depending on the type binding.

[FranckFreiburger]

I understand.
I just tying to create a widget that fits the input data type:

<div id="app">
  <input
    v-for="option in options"
    :type="multiple ? 'checkbox' : 'radio'"
    v-model="model"
    :value="option.value"
  >
</div>

new Vue({
  el: '#app',
  data: {
    //model:[2],
    model:2,
    options: [
    	{ value:'1', text:'foo 1' },
    	{ value:'2', text:'foo 2' },
    	{ value:'3', text:'foo 3' }, // ...
    ],
  },
  computed: {
    multiple() {
    	return Array.isArray(this.model);
    }
  }
})

If I understand, this will never work ? is it possible to be warned in DEV mode about this case ?