峰间的云| Selector Type | Example | Note |
|---|---|---|
| Universal selector | * { color:#555; } | / |
| Type selectors | b { color:red; } | div,p select all <div> elements and all <p> elements. |
| Class selectors | .classname { color:blue; } | / |
| ID selectors | #idname { background:cyan; } | / |
| Descendant selectors | span em { color:green } | Select all <em> elements who have a parent element of <span>. |
| Child selectors | div > em { background:lime; } | Select all <em> elements who have a direct parent element of <div> |
| Adjacent sibling selectors | i + b { color:gray; } | Select the <b> element who is directly after the <i> element, and meanwhile both the <i> and <b> elements should be within a same parent element. |
| Attribute selectors | a[href=’info.htm’] { color:red; } | / |
| Pseudoclasses | a:hover { font-weight:bold; } | / |
| Pseudoelements | p::first-letter { font-size:300% } | / |
CSS Selectors, Pseudoclasses, and Pseudoelements
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