[4.0.0-rc.0] ion-tab-button requires tab contradictory to the docs and preventing 'plain buttons'

[tehXor]

Bug Report

Ionic version:
[x] 4.0.0-rc.0

Current behavior:
An ion-tab-button without a tab attribute but only a (click) attribute will throw an exception on load that tab is required. On click it will try to navigate to <current-route>/undefined which again will lead to an exception which also prevents (click) to be executed.

Expected behavior:
Like the docs say at https://github.com/ionic-team/ionic/blob/master/angular/BREAKING.md#tabs this should be "No ion-tab, just a button that looks like a tab" and therefore (click) should be executed.

Steps to reproduce:
Build an example like shown at https://github.com/ionic-team/ionic/blob/master/angular/BREAKING.md#tabs under "New Usage Example:" and here under "No ion-tab, just a button that looks like a tab"

I know same for me!

[jeandonaldroselin]

Hello @manucorporat,

First a triple GREAAT thank you ( All Ionic Team ) for great job you are doing with this Ionic 4's version

and previous versions ( I use ionic from the first's version ).

----------------------- I CONTACT YOU FOR THIS ------------------------

I tried to add ( a click event, then a href attribute ) on the ion-tab-button component.

But it raise the error that the "tab" attribute is mandatory etc ..

• [When I watch your PR, the error is fixed. SO It is OK ]

• [When I watch the doc of the ion-tab-buttons component (https://beta.ionicframework.com/docs )
  I see it is updated with href attribute etc .. SO It is OK ]

• [ When I create a new project based on the latest Ionic's version ( 4.0.0-rc.0 ), the problem is still present.]

----------------------------- MY QUESTION ------------------------------

Please do you know when the next release ( 4.0.0-rc.1 or other ) is planned ?

[ionitron-bot]

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