When working with ng-show and ng-hide in AngularJS, I noticed a brief 1ms delay where both objects are still

I am encountering a similar issue as discussed in the following post: How to use ng-show and ng-hide with buttons in AngularJS

In my case, I have play/pause buttons where the ng-show/hide functionality is working. However, the problem lies in the fact that I still briefly see both objects for about 1ms.

I have structured them consecutively like this:

<span ng-show="status() != 1">
   <span class="fa fa-play" ng-click="play()"></span>
</span>
<span ng-hide="status() != 1">
   <span class="fa fa-pause" ng-click="pause()"></span>
</span>

There are other elements before and after these two buttons (prev/next), and when I quickly toggle between play/pause, sometimes I don't notice the transition between showing and hiding them efficiently. Occasionally, I do observe either the pause or play button appearing for 1ms before disappearing.

This inconsistency is really bothering me. Can anyone suggest an alternative approach to tackle this issue?

javascriptangularjs

Answer №1

If you're experiencing flickering issues with DOM elements, consider reducing the number of changes made to the DOM. You can achieve the same outcome by utilizing just 1 span and making minor adjustments to it.

<span class="fa" ng-class="{'fa-pause':status() == 1,'fa-play':status() != 1}" ng-click="status() == 1 ? pause() : play()"></span>

Changes in the DOM often start from a parent scope and cascade down to all children. In your scenario, the first <span> is processed before the next sibling. This creates a brief period where one <span> is processed while the next sibling is awaiting processing.

You can simplify your HTML and JS code by using CSS for visibility control.

CSS

.playing .fa-play { display: none; }
.playing .fa-pause { display: inline; }
.stopped .fa-play { display: inline; }
.stopped .fa-pause { display: none; }

HTML

<span ng-class="{playing:state()==1,stopped:state()!=1}">
      <span class="fa fa-play" ng-click="play()"></span>
      <span class="fa fa-pause" ng-click="pause()"></span>
</span>

Answer №2

Experiment with using ng-show for both buttons, but change the condition for one to status() == 1

Alternatively, you could simplify by merging the two buttons into one and swapping the CSS class and click handler depending on the current "mode"

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