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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <meta charset="UTF-8">
- <meta http-equiv="X-UA-Compatible" content="IE=edge">
- <meta name="viewport" content="width=device-width, initial-scale=1.0">
- <title>Document</title>
- </head>
- <body>
- <div data-name="cool" data-nameList="123" data-first-name="haha">123</div>
- <script>
- var div1 = document.querySelector('div')
- /*
- 给元素设定自定义属性
- 第一种不会再html里面看到
- 1.div1.index(属性值)
- 2.div1.setAttribute(属性名，属性值)
- 3.div1.dataset.属性名(属性值)
- */
- div1.index = 1
- div1.setAttribute('name','x')
- div1.dataset.age = 18
- console.log(div1.index)
- console.log(div1.getAttribute('name'))
- console.log(div1.dataset.age)
- console.log(div1.dataset.name)
- console.log(div1.dataset.namelist)
- console.log(div1.dataset.firstName)
- </script>
- </body>
- </html>
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