当选择某一项时，需要把指定项的值存储起来后使用

e.g： el-select 选中美国海外仓(USA)，需要把 arr 数组中的每一项的 key(属于 USA 下的数据)传回给后端

let arr = [
  {
    value: "波兰仓库03",
    key: 1406920626937065500,
    platform: "Mbb",
  },
  {
    value: "工业城仓",
    key: 1430742236437651500,
    platform: "Hx",
  },
  {
    value: "安大略仓",
    key: 1430742236580257800,
    platform: "Hx",
  },
  {
    value: "富勒顿仓",
    key: 1430742236643172400,
    platform: "Hx",
  },
  {
    value: "LAX99",
    key: 1431153262349910000,
    platform: "Aybases",
  },
  {
    value: "TESTO1",
    key: 1431153262404436000,
    platform: "Aybases",
  },
  {
    value: "洛杉矶1号仓",
    key: 1432520453796274200,
    platform: "Aybases",
  },
  {
    value: "洛杉矶2号仓",
    key: 1432520453817245700,
    platform: "Aybases",
  },
];

let choseValue = "USA";

// 触发下单人/团队下拉框
let fun1 = function changeSubscriber(val) {
  if (val.length === 0) {
    this.searchKey = [];
    this.keys = [];
  }
  // console.log(val,'当前选中的值');
  let choseValue = val.join();
  // let keys = [];
  if (["USA", "Europe"].includes(choseValue)) {
    for (let i = 0; i < this.subscriberList.length; i++) {
      let ele = this.subscriberList[i];
      if (choseValue === "USA") {
        if (["Mbb", "Hx"].includes(ele.platform)) {
          this.keys.push(ele.key);
        }
      } else if (choseValue === "Europe") {
        if (["Mbb", "Aybases"].includes(ele.platform)) {
          this.keys.push(ele.key);
        }
      }
    }
  } else {
    this.searchKey = val;
  }

  // console.log(this.keys,'keys')
};

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优化写法

let fun2 = function changeSubscriber(val) {
  let choseValue = val.join();
  let _map = {
    USA: ["Mbb", "Hx"],
    Europe: ["Mbb", "Aybases"],
  };
  // Object.key(_map)  返回可枚举属性组成的数组, ['USA', 'Europe']
  if (Object.keys(_map).includes(choseValue)) {
    this.keys = this.subscriberList.filter((v) => {
      // 返回为真的这一项
      return _map[choseValue].includes(v.platform);
    });
    // return
  }
  this.searchKey = choseValue ? val : [];
  // 没值的时候是false，取反就是true
  if (!choseValue) {
    this.keys = [];
  }
};

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在线编辑

#技巧总结

上次更新: 2021/11/14, 15:48:46

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