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docs(guide/directive): explain controllerAs option

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There was nothing about controllerAs in the developer guide.

Helps #6710 and #6759
This commit is contained in:
Richard Littauer
2014-05-24 15:02:17 -07:00
committed by Brian Ford
parent b306babe29
commit ca566d8d81
1 changed files with 5 additions and 0 deletions
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docs/content/guide/directive.ngdoc
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@@ -901,6 +901,11 @@ So where does this `myTabs` controller come from? Directives can specify control
the unsurprisingly named `controller` option. As you can see, the `myTabs` directive uses this
option. Just like `ngController`, this option attaches a controller to the template of the directive.
If it is necessary to reference the controller or any functions bound to the controller's scope in
the template, you can use the option `controllerAs` to specify the name of the controller as an alias.
The directive needs to define a scope for this configuration to be used. This is particularly useful
in the case when the directive is used as a component.
Looking back at `myPane`'s definition, notice the last argument in its `link` function: `tabsCtrl`.
When a directive requires a controller, it receives that controller as the fourth argument of its
`link` function. Taking advantage of this, `myPane` can call the `addPane` function of `myTabs`.