Cannot detect change of array from checkbox v-model?

[bigZ-again]

Version

2.2.6

Reproduction link

https://fiddle.jshell.net/whoisbigZ/ec11h6gj/2/

Steps to reproduce

I use deep watch to trace an object. See source code, it's very simple.

What is expected?

I hope the setter of v-model should notice deep watch. Why not?

What is actually happening?

But I found the vue cannot detect the array change from checkbox.

---

I know some caveats about detect the changes of array, but I just use v-model in checkbox.

[posva]

You're falling under this caveat: https://vuejs.org/v2/guide/list.html#Caveats
You can use an object to overcome it (in many ways). Ex: instead of an array for d use an object: {0: true, 1: false} You can also have an array of objects: d: [{model: true}, {model:false}]

[bigZ-again]

I know everything that @posva said.
But I use v-model to bind a element of array to a input tag with type is checkbox, I don't directly set any element of array, It been done by vue's v-model.
In my demo, I use v-model to bind a element of array to other input tag which type isn't checkbox, the change can be detected.
Why checkbox is NOK! In this case, why v-model don't use Vue.set to set the element of array.
Maybe it isn't a issue, or feature request, PLEASE use vue.set when use v-model to bind a element of array to a checkbox.

[posva]

I'm giving it a deeper look. I'm not sure it's actually intended

[maximelebreton]

I think I have the same problem:
https://jsfiddle.net/dq90hkb8/1/
Vue 2.2.6

[bigZ-again]

@maximelebreton Because storedValues.three isn't exist.
You can ref: https://jsfiddle.net/y43nse2o/1/