v-else not work when together with v-show on custom component

[Centaur]

Vue.js version

1.0.21

Reproduction Link

http://www.webpackbin.com/412B9bgJb

Steps to reproduce

click Toggle button

What is Expected?

when MyComponent is showing, the msg should be hidden

What is actually happening?

the msg always shows

[posva]

I'm taking a look, not sure if it's a bug or not

[posva]

Ok, confirmed. It only happens on v-show though, it works on v-if
Thanks for the bug submission! 😄

Here's a jsfiddle https://jsfiddle.net/vny4z8kj/1 (I cannot edit the webpackbin...)

[thattomperson]

seems to do the exact opposite on templates
http://codepen.io/ThatTomPerson/pen/vGdyoB

[yyx990803]

@thattomperson v-show doesn't work on <template> by design, so that's working as intended.

[thattomperson]

@yyx990803 Ah ok, I'll just replace it with a div and hope the designer doesn't notice 😄

[blake-newman]

v-show shouldn't be connected to v-else. As this doesn't natively translate to traditional programmatical logic.

[posva]

@blake-newman the v-show is just an if that hides instead of removing. v-else turns out to be very handy, it definitely reads better than v-show="!expr"

[posva]

BTW I didn't forgot about the issue. I couldn't allocate enough time for it in the past two weeks 😞
I'll find some time this weekend for sure

[blake-newman]

@posva Understand about the internals. Question in my mind is: 'Should v-show be combined with v-else?'

One issue is that v-else is currently terminable. Which means the logic behind how v-else works will completely differ based on the prefixing directive. I believe in my own opinion that this would be confusing.

What happents if there is a v-if and a v-show what would v-else be applied to. This is a weird case, but it is very valid to have v-if and v-show available on a single element.

[posva]

The v-show would to apply to both I guess. I'm not sure about the use case thought

I think v-else should be replaced by v-show="!expr", and let v-if work as it is but I'm not sure this would solve the real problem which I cannot recall clearly but it has to deal with directives priorities that were not applied for components (component is a directive itself with a given priority)

[ruiposse]

I understand that it is tempting to get v-show to work with v-if once you think about it, but at first it felt a bit counter-intuitive because there would be no v-if to look for.

I also agree that the framework shouldn't be changed to accommodate this behaviour.