FAQ: Animation - Transitions - All

This community-built FAQ covers the “All” exercise from the lesson “Animation - Transitions”.

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When the all value is used, how does the browser know which properties to affect? For example, if we take away width, left, and font-size, what’s to stop it from changing the height, right, and font-weight?


I think it might be because it only affects pseudoclasses like hover?

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" all means every value that changes will be transitioned in the same way."

Elements that dont change when hovered, just wont change.

.button:hover span {
  left: -72%;

.button:hover .icon {
  width: 100%;

.button:hover .icon .fa {
  font-size: 45px;

This makes sense in theory however, I am having an issue where the font and icon are growing and shaking when reloading, I moved my transition: property into the :hover rule and it solved the issue.

I do remember learning about not putting transitions, cursor changes etc. in the :hover rule as it can cause weird behavior, so I am not sure this is “proper”.

The advice is sound and based upon user experience. Soft, smooth transition of color is one thing, but transitioning position is another thing entirely. Avoid any jerkiness, shaking, exaggerated movement, etc. else your visitor will just bounce and not return.

Be sure to read up on the accessibility concerns around this aspect, as well.

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