查看帮助程序:如果布尔值为 false，则为 classBinding [英] View helper: classBinding if boolean is false

问题描述

如果布尔值为 FALSE，如何使用 #view 助手将类绑定到视图?

How can I bind a class to a view with the #view helper, if a boolean is FALSE?

// this is working
{{#view App.MyView controllerBinding="this" classBinding="controller.content.isActive"}}
    <div>test</div>
{{/view}}

// and this is what i want:
{{#view App.MyView controllerBinding="this" classBinding="!controller.content.isActive:is-not-active"}}
    <div>test</div>
{{/view}}

如果 controller.content.isActive 为 false，我想将 is-not-active 作为类名绑定到视图.

I want to bind is-not-active as a class name to the view, if controller.content.isActive is false.

我可以在视图上做一个简单的逆变器功能，但我有更好的方法.

I can make an simple inverter function on the view, but I there is a better way.

推荐答案

UPDATE:Pull Request 已合并，因此您可以为 false 值添加一个类像这样:

UPDATE: The Pull Request has been merged, so you can add a class for a false value like this:

{{#view App.MyView controllerBinding="this"
   classBinding="controller.content.isActive:is-active:is-not-active"}}
{{/view}}

如果您不想在值为 true 的情况下添加类，可以使用以下语法:

If you don't want to add a class if the value is true, you can use the following syntax:

{{#view App.MyView controllerBinding="this"
   classBinding="controller.content.isActive::is-not-active"}}
{{/view}}

<小时>

我会在视图上创建一个属性(就像你已经用你的逆变器做的那样)并绑定到这个:

---

I would create a property on the view (like you already do with your inverter) and bind to this:

把手:

{{#view App.MyView controllerBinding="this" classBinding="isNotActive"}}
    <div>test</div>
{{/view}}

JavaScript:

App.MyView = Ember.View.extend({
    isNotActive: Ember.Binding.not('controller.content.isActive')
});

<小时>

我创建了一个 Pull Request 尚未合并但它解决了这个问题，并会像这样解决它:

---

I've create a Pull Request which has not yet been merged but it addresses this issue and would solve it similar to this:

{{#view App.MyView controllerBinding="this"
   classBinding="controller.content.isActive:is-active:is-not-active"}}
    <div>test</div>
{{/view}}

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