CSS經常使用僞類使用詳解

首先僞類是用單冒號表示：如:link, :visited, :hover, :active, :focus, :first-child, :last-child, :nth-child, :nth-last-child, :not()html 而後僞元素用雙冒號表示：如::first-letter, ::first-line, ::before, ::aftergoogle 1.用於連接的幾個僞類

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