What is the meaning of the + sign in .xxx: checked+.xxx:after in css?

.xxx is a class that does not affect

Mar.21,2021

elementA+elementB Select all elementB immediately following elementA .


is next to the selector. Choose the sibling .xxx: after element closest to question .xxx: checked,
http://www.runoob.com/cssref/.


to find the next element next to one element, in other popular words: find the next brother. For example: eldest brother + younger brother, you can find the second.
the document is in here

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