js 两数组去重

场景 new Set

1.1 合并两个数组并去除相同的数据

 var data1=['1','2','3']
 var data2=['1','5','9']
 var newArr=[...new Set(data1.concat(data2))]  //结果 ['1', '2', '3', '5', '9']
 var newArrs=[...new Set([...data1,...data2])] //结果 ['1', '2', '3', '5', '9']