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This article mainly introduces what the css structure selector has, which has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor take you to understand it.

Structure selector

Selector description version commonly used: root document root element 3 ×: empty no child element 3 √: nth-child (n) element specified sequential index element 3 √: nth-last-child (n) element specified reverse index element 3 ×: first-child element leading element 2 √: last-child element 3 √: only-child parent element has only the element 3 √: nth- of that element Tag 3 √: nth-last-of-type (n) tag that specifies the order index in the of-type (n) tag that specifies the reverse index tag 3 ×: first-of-type tag headed by the tag 3 √: last-of-type tag with the tail tag 3 √: only-of-type parent element only the tag 3 √ of that tag

What is the basic syntax of css? the basic syntax of css is: 1, the css rule consists of a selector and one or more declarations; 2, the selector is usually a HTML element that needs to change the style; 3, each declaration consists of an attribute and a value; 4, attributes and attribute values are separated by colons.

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