- HTML5中，自定义属性需以 data- 为前缀，如 data-name="Jack"。
- HTML5中，可通过 dataset 对象获取自定义属性的值。
- HTML5中，dataset 对象获取语法：
document.querySelector("选择器").dataset
获取自定义属性
自定义属性获取语法：
Element.dataset.属性名 或 Element.dataset['属性名']
示例：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>test</title>
</head>
<body>
<div id="person" data-name="Petter" data-age="26" data-employee-number="001">车间员工</div>
<script>
var data = document.querySelector("#person").dataset;
var name1 = data.name;
var age1 = data.age;
var employeeNumber1 = data.employeeNumber;
console.log(name1, age1, employeeNumber1);
var name2 = data['name'];
var age2 = data['age'];
var employeeNumber2 = data['employeeNumber'];
console.log(name2, age2, employeeNumber2);
</script>
</body>
</html>
动态设置自定义属性
动态设置自定义属性获取语法：
Element.dataset.属性名 = '属性值' 或 Element.dataset['属性名'] = '属性值'
示例：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>test</title>
</head>
<body>
<div id="person">车间员工</div>
<button id="change">切换员工</button>
<script>
var element = document.querySelector("#person");
element.dataset.name = 'Tom';
element.dataset.age = '30';
element.dataset.employeeNumber = '002';
var data1 = document.querySelector("#person").dataset;
var name1 = data1.name;
var age1 = data1.age;
var employeeNumber1 = data1.employeeNumber;
console.log(name1, age1, employeeNumber1);
document.querySelector("#change").onclick = function()
{
element.dataset['name'] = 'Jack';
element.dataset['age'] = '28';
element.dataset['employeeNumber'] = '003';
var data2 = document.querySelector("#person").dataset;
var name2 = data2.name;
var age2 = data2.age;
var employeeNumber2 = data2.employeeNumber;
console.log(name2, age2, employeeNumber2);
}
</script>
</body>
</html>
