AMP: Switch CSS Style

When creating an amp template, I included a button that toggles the visibility of an amp-sidebar. The code for the button is as follows:

<button class="button .closed icon" on='tap:sidebar1.toggle'></button>

The side-bar toggles successfully. However, I'd like to have the icon displayed change based on the state (open or closed).

For this purpose, I have defined two classes:

  • button .closed (hamburger menu icon)

  • button .open (cross)

The shared class "icon" will remain consistent between the two states. Additionally, the 'tap:sidebar1.toggle' functionality is essential for the menu to toggle.

htmlcsstogglegoogle-amp

Answer №1

To achieve this goal, you can utilize an amp-state to monitor the status of the sidebar, whether it is open or closed. By binding the button's class to this state, you can style it accordingly.

Begin by setting up an amp-state like this :

<amp-state id = "sbOpen">
    <script type = "application/json">
        false
    </script>
</amp-state>

Next, modify your sidebar code as shown below :

<amp-sidebar
 on="sidebarOpen:AMP.setState({sbOpen});sidebarClose:AMP.setState({sbOpen})"

Lastly, adjust your button tag to something similar to this :

<button class="button closed icon" on='tap:sidebar1.toggle'
        [class]="'button icon ' + (sbOpen?'open':'closed')"></button>

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