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118. What is Skeleton Screen? How to implement them?

To implement Skeleton Screen, we need to follow these steps:

  1. Identify the content that needs to be loaded asynchronously
  2. Prepare placeholders (skeletons) for each piece of content. These placeholders must have a similar size and layout as the content they represent.
  3. Display the placeholders on the screen immediately when the page or screen is loaded.
  4. Start loading the content in the background. Once the content is loaded, display it in the placeholders.
  5. Remove or hide the placeholders when the content is fully loaded.

Some technical challenges we may face while implementing a Skeleton Screen are:

  1. Detecting the end of loading: We need to make sure that we start removing the placeholders and displaying the content as soon as it is available. JavaScript code can be used to detect the end of loading for each component.
  2. CSS Animations: Skeleton Screens may involve some animations between the placeholders and the loaded content. We need to ensure that these animations have smooth transitions.
  3. Accessible: When designing Skeleton Screens, we need to make sure that they are accessible to users with disabilities. For example, the use of ARIA attributes, enabling keyboard navigation, and allowing for zoom capability.

Overall, implementing Skeleton Screens can improve the user experience by providing quick feedback and maintaining the layout structure of the page.