查询单个元素document.getElementById
示例
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<!DOCTYPE html><html> <head> <title>访问元素</title> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <style> .mycolor{ color:#fff; } </style> </head> <body> <ul id="ul"> <li id="a">油条</li> <li id="b">包子</li> <li id="c">米饺</li> <li id="d"><a>鱼粉</a></li> </ul> <script> // 返回单一元素节点 var el = document.getElementById('a'); el.className='mycolor'; </script> </body></html> |