Object.key(obj)获取对象属性名集合

Object.key(obj) //obj为对象，上述可得到对象的属性名集合的数组对象

var data = { '易烊': [20, 30, 10], '千玺': [20, 10, 60], '小北': [20, 10, 60], '小易': [20, 10, 30] } let newKeys = Object.keys(data) console.log(newKeys) ["易烊", "千玺", "小北", "小易"