What is the difference between display:none and visibility:hidden

The difference between [display:none] and [visibility:hidden] is: 1. The former does not reserve its physical space for hidden objects, while the latter reserves its physical space for hidden objects; 2. The former The structure will not be loaded until the value becomes block, which will already load it when the page is loaded.

##display:none Do not reserve physical space for hidden objects

Reserves its physical space for the hidden object, that is, display:;When its value becomes

, where it is located The structure will be loaded. And

will be loaded in when the page is loaded, because when its value is hidden, the space it occupies is still exist. After using the CSS

attribute, the width, height and other attribute values ​​​​of the HTML element (object) will be "lost"; and the visibility: After the hidden attribute, the HTML element (object) is only visually invisible (completely transparent), and the space it occupies still exists

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