30:T901,rawData = { return { name: "中国", children: [ { name: "浙江", children: [ { name: "杭州" }, { name: "宁波" }, { name: "温州" }, { name: "绍兴" } ] }, { name: "广西", children: [ { name: "桂林" }, { name: "南宁" }, { name: "柳州" }, { name: "防城港" } ] }, { name: "黑龙江", children: [ { name: "哈尔滨" }, { name: "齐齐哈尔" }, { name: "牡丹江" }, { name: "大庆" } ] }, { name: "新疆", children: [ { name: "乌鲁木齐" }, { name: "克拉玛依" }, { name: "吐鲁番" }, { name: "哈密" } ] }, { name: "河北", children: [ { name: "石家庄" }, { name: "唐山" }, { name: "邯郸" }, { name: "秦皇岛" } ] }, { name: "西藏", children: [{ name: "拉萨" }, { name: "昌都" }, { name: "林芝" }] }, { name: "江苏", children: [ { name: "南京" }, { name: "无锡" }, { name: "徐州" }, { name: "常州" }, { name: "连云港" }, { name: "淮安" } ] }, { name: "湖南", children: [ { name: "长沙" }, { name: "株洲" }, { name: "湘潭" }, { name: "衡阳" }, { name: "邵阳" }, { name: "岳阳" } ] }, { name: "海南", children: [{ name: "海口" }, { name: "三亚" }, { name: "三沙" }] }, { name: "陕西", children: [ { name: "西安" }, { name: "咸阳" }, { name: "汉中" }, { name: "安康" }, { name: "榆林" }, { name: "延安" } ] }, { name: "甘肃", children: [ { name: "兰州" }, { name: "酒泉" }, { name: "金昌" }, { name: "天水" }, { name: "嘉峪关" }, { name: "武威" } ] } ] }; }31:T69e,canvas = { div; // wait for DOM to load // clean slate document.querySelector('.canvas').innerHTML = ''; // append canvas document .querySelector('.canvas') .appendChild(document.createElement('h2')).textContent = '