Toggle Component API

The toggle component allows us to react to events and toggle the UI state.

Parameters

The toggle component accepts the following parameters:

show_on - optional

The show_on option lets us define an event on which the component gets shown. The content is still rendered on init pageload, but simply hidden in the browser until the event is emitted. If you want to have proper deferred loading, please refer to defer

toggle show_on: 'my_event' do
  div id: 'my-div' do
    plain 'I was not here before the event'
  end
end

You can pass in multiple, comma-separated events on which the component should be shown.

toggle show_on: 'my_event, some_other_event'

hide_on - optional

The hide_on option lets us define an event on which the component gets hidden.

toggle hide_on: 'my_event' do
  div id: 'my-div' do
    plain 'You will not see me after the event'
  end
end

You can pass in multiple, comma-separated events on which the component should be hidden.

toggle hide_on: 'my_event, some_other_event'

hide_after - optional

The hide_after option lets us define a timespan in milliseconds after which the component gets hidden.

toggle hide_after: 1000 do
  div id: 'my-div' do
    plain 'I will be hidden after 1000ms'
  end
end

init_show - optional

The init_show option lets us define if the content should be shown initially.

By default the content is shown initially unless show_on is defined.

init_show is therefore only used in a context like this:

toggle show_on: "my_show_event", hide_on: 'my_hide_event', init_show: true do
  div id: 'my-div' do
    plain "I'm initially shown and then can be toggled based on events"
  end
end

Example

Show on event

On our example page, we wrap a simple timestamp in an toggle component and tell it to show up when the event my_event gets triggered.

class ExamplePage < Matestack::Ui::Page

  def response
    toggle show_on: 'my_event' do
      div id: 'my-div' do
        plain "#{DateTime.now.strftime('%Q')}"
      end
    end
  end

end

After our event was fired, the timestamp only is visible on our page!

Hide on event

On our example page, we wrap a simple timestamp in an toggle component and tell it to hide it when the event my_event gets triggered.

class ExamplePage < Matestack::Ui::Page

  def response
    toggle hide_on: 'my_event' do
      div id: 'my-div' do
        plain "#{DateTime.now.strftime('%Q')}"
      end
    end
  end

end

As expected, the timestamp is only visible before our event was fired and is hidden/invisible after the event!

Hide after show on event

On our example page, we wrap a simple timestamp in an toggle component and tell it to show up when the event my_event gets triggered and be hidden after 1000 milliseconds.

class ExamplePage < Matestack::Ui::Page

  def response
    toggle show_on: 'my_event', hide_after: 1000 do
      div id: 'my-div' do
        plain "#{DateTime.now.strftime('%Q')}"
      end
    end
  end

end

In this case, the timestamp only is visible after our event was fired, but only for a certain amount of time. After the time is up, it gets hidden!

Show on event with event payload

On our example page, we wrap our toggle event around a placeholder for the event message.

class ExamplePage < Matestack::Ui::Page

  def response
    toggle show_on: 'my_event' do
      div id: 'my-div' do
        plain "{{event.data.message}}"
      end
    end
  end

end

As an example, we can fire the following event:

MatestackUiCore.eventHub.$emit("my_event", { message: "test!" })

As a result, the event message gets shown after our event was fired!

Combine show_on/hide_on

If you combine show_on and hide_on, you can toggle the view state of the toggle component explicitly.

By default, the content is initially hidden until the show event is emitted when show_on is applied.

toggle show_on: "my_show_event", hide_on: 'my_hide_event' do
  div id: 'my-div' do
    plain 'You will not see me after the event'
  end
end

If you want to display the content initially, simply add init_show: true

toggle show_on: "my_show_event", hide_on: 'my_hide_event', init_show: true do
  div id: 'my-div' do
    plain 'You will not see me after the event'
  end
end