js获取自定义data属性

时间：2023-12-09 17:00:19
<!DOCTYPE html>

<html>

<head lang="en">

    <meta charset="UTF-8">

    <title></title>

</head>

<body>

<div id="tree" data-leaves="47" data-plant-height="2.4m"></div>

<script>

    var tree = document.getElementById("tree");

    //getAttribute()取值属性

    console.log(tree.getAttribute("data-leaves"));

    console.log(tree.getAttribute("data-plant-height"));

    //setAttribute()赋值属性

    tree.setAttribute("data-leaves","48");

    //data-前缀属性可以在JS中通过dataset取值，更加方便

    console.log(tree.dataset.leaves);

    console.log(tree.dataset.plantHeight);

    //赋值

    tree.dataset.plantHeight = "3m";

    tree.dataset.leaves--;

    //新增data属性

    tree.dataset.age = "100";

    //删除，设置成null，或者delete

    tree.dataset.leaves = null;

    delete tree.dataset.age;

    //jQuery的data方法

    var $tree = $('#tree');

    console.log($tree.data("plant-height"));

</script>

</body>

</html>

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