new Map 使用

var statusMsg = new Map([
    [1, "待下发"],
    [2, "待分配"],
    [3, "待跟进"],
    [4, "跟进中"],
    [5, "暂败"],
    [6, "无效"],
    [7, "战败"],
    [8, "已下单"],
  ])

statusMsg.get(1) // '待下发'