<body>
<div data-leaves="47" data-plant-height="2.4m"></div>
<script>
var tree = ("tree");
//getAttribute()取值属性
(("data-leaves"));
(("data-plant-height"));
//setAttribute()赋值属性
("data-leaves","48");
//data-前缀属性可以在JS中通过dataset取值，更加方便
();
();
//赋值
= "3m";
--;
//新增data属性
= "100";
//删除，设置成null，或者delete
= null;
delete ;
//jQuery的data方法
var $tree = $('#tree');
($("plant-height"));
</script>
</body>