el-select下拉框 change事件返回该项所有数据

 主要代码 value-key

<template>
  <div>
    <el-select
      v-model="value"
      value-key="label"
      placeholder="请选择"
      @change="selectChange"
    >
      <el-option
        v-for="item in options"
        :key="item.label"
        :label="item.label"
        :value="item"
      >
      </el-option>
    </el-select>
  </div>
</template>

<script>
export default {
  data() {
    return {
      options: [
        {
          value: "选项1",
          label: "黄金糕",
        },
        {
          value: "选项2",
          label: "双皮奶",
        },
        {
          value: "选项3",
          label: "蚵仔煎",
        },
        {
          value: "选项4",
          label: "龙须面",
        },
        {
          value: "选项5",
          label: "北京烤鸭",
        },
      ],
      value: "",
    };
  },
  mounted() {},
  methods: {
    selectChange(item) {
      console.log(item);
    },
  },
};
</script>

<style scoped></style>

 以下暂时自行理解，需与后端对接（有时间在整理）。。。。。

1. input 远程搜索

 <el-autocomplete
                style="width: 100%"
                v-model="form.ENTNAME"
                :fetch-suggestions="querySearchAsync"
                placeholder="企业名称"
                @select="handleSelect"
                clearable
                value-key="ENTAME"
              >
              </el-autocomplete>

 querySearchAsync(query, callBack) {
      if (query!== "") {
        this.$http
          .post("/system/ssoloin/getUrlataMap", {
            method: "getEntByword",
            token: getToken(),
            mapData: { type: "0", keyword: query},
          })
          .then((res) => {
            callBack(res.data.data.RESULTDATA);
          });
      }
    },

    handleSelect(item) {
      this.$http
        .post("/syem/ssolon/getUrltap", {
          method: "getRegistnfo",
          token: getToken(),
          mapData: { type: "0", keyWord: item.ENTNAME },
        })
        .then((res) => {
          this.form = res.data.data.RESTDATA[0];
        });
    },

 2. select 远程搜索

<el-select
                v-model="form.ENTNAME"
                filterable
                remote
                reserve-keyword
                placeholder="请输入企业名称"
                :remote-method="remoteMethod"
                :loading="loading"
                style="width: 100%"
                @change="selectChange"
              >
                <el-option
                  v-for="(item, index) in options"
                  :key="index"
                  :label="item.ENTNAME"
                  :value="item.ENTNAME"
                >
                </el-option>
              </el-select>

    remoteMethod(query) {
      if (query !== "") {
        this.loading = true;
        this.$http
          .post("/syst/ssgin/getUrlaMap", {
            method: "getEyKeyord",
            token: getToken(),
            mapData: { type: "0", keyword: query },
          })
          .then((res) => {
            this.loading = false;

            this.options = res.data.data.RESUDTA;
          });
      } else {
        this.options = [];
      }
    },

 selectChange(value) {
      this.$http
        .post("/syem/ssogin/getUrlDaMap", {
          method: "getRegierInfo",
          token: getToken(),
          mapData: { type: "0", keyWord: value},
        })
        .then((res) => {
          this.form = res.data.data.RESULATA[0];
        });
    },