<!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>
