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How to improve list slowness on low-end devices

Question

How to improve list slowness on low-end devices and provide good scroll experience, preventing some blank spaces from appearing?

Answer

Create an image to a be the preview for list items without data.

Then, do the following:

  1. Import the image to your application

image alt text

  1. Open the CSS Editor and create a new class to use the image as background
.task-list > script{                               
    background: url(...) ! important;                  |      
    /* Drag and drop the image to set the URL of the image */
} 

image alt text

  1. Add the new CSS class to the Style Classes of the List widget

image alt text

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