Display:none vs. Visibility:hidden: Which is Better for Performance?

Impact of Browser Performance When Switching from Display:None to Visibility:Hidden

When optimizing frontend performance, understanding the implications of CSS visibility and display properties is crucial. In this context, let's explore the impact on browser performance when transitioning from "display:none" to "visibility:hidden" for hiding elements.

Visibility:hidden elements remain part of the render tree (elements that the browser actively works with). While not visible to the user, they still contribute to the DOM layout and can affect the page load time and browser responsiveness. In contrast, display:none elements are completely removed from the render tree, saving browser resources and improving overall performance.

While this distinction suggests that display:none should always be preferred, it's important to consider the specific functionality requirements. If you need to hide an element and maintain its position in the layout, visibility:hidden may be appropriate. However, if the element's visibility status is purely aesthetic, display:none is a better choice for performance optimization.

In the particular scenario described, where approximately 10 div boxes remain hidden throughout the application's session, the performance impact of visibility:hidden is unlikely to be noticeable. But for large-scale applications with a higher number of hidden elements, display:none would be more advantageous.

Ultimately, the decision between visibility:hidden and display:none should be based on the combination of performance requirements and the specific functionality of the elements being hidden.

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