emis-frontend/src/views/emis/EmisBaseTools/TransLinePicker.vue

<template>
      <el-select
      ref="selectRef"

      :disabled="disabled"

      style="width:100%"
      filterable
      clearable
      remote
      :remote-method="queryData"
      v-model="svalue"
      :placeholder="placeholder"
      @focus="onFocus"
      @blur="onBlur"
      @change="onChange"
      @visible-change="reverseArrow"

      >
      <el-option v-for="item in optionItems" :key="item.lineCode" :label="item.lineName" :value="item.lineCode" />
    </el-select>
<!-- style="width:100%" -->

</template>
<script>
  import emitter from 'element-ui/src/mixins/emitter';
  import { listSimpleEmisTransLine } from "@/api/emis/emisTransLine";

  export default {
    name: "TransLinePicker",
    mixins: [emitter],
    props: {
      value: {
        type: String,
        required: false
      },
      placeholder:{
        type: String,
        required: false
      },
      countryCode: {
        type: String,
        required: false
      },
      fromCountry: {
        type: String,
        required: false
      },
      isInitiated:{
        type: [Boolean,String],
        required: false,
        default:false
      },
      disabled:{
        type: [Boolean],
        required: false
      },
    },
    data() {
      return {
        optionItems: [],
        svalue: this.value,
        filterMap:new Map(),
        queryParams: {
          pageNum: 1,
          pageSize: 50,
          lineCode:null,
          lineName:null,
          country:this.countryCode,
          fromCountry:this.fromCountry
        }
      };
    },
    watch: {
      value(newVal) {
        this.svalue = newVal;
        this.queryParams.lineCode=this.svalue ;
      },
      countryCode(newVal) {
        this.queryParams.country=this.countryCode;
        this.queryData();
      },
      fromCountry(newVal) {
        this.queryParams.fromCountry=this.fromCountry;
        this.queryData();
      },

    },
    created() {
      if(this.isInitiated || this.svalue!=null){
        this.queryData();
      }
    },
    mounted(){
      let rulesDom = this.$refs["selectRef"].$el.querySelector(".el-input .el-input__suffix .el-input__suffix-inner .el-input__icon"); // 找到dom
      rulesDom.classList.add("el-icon-arrow-up"); // 对dom新增class
    },
    methods: {
      onFocus(val){
        this.optionItems=[];
        this.queryData();
      },
      onBlur(val){
        this.$emit("input", this.svalue);
        this.dispatch('ElFormItem', 'el.form.blur', [this.svalue]);
      },
      onChange() {
        this.$emit("input", this.svalue);
        this.$emit("onChange",this.filterMap[this.svalue]);
        this.dispatch('ElFormItem', 'el.form.change', [this.svalue]);
      },
      queryData(val) {
        this.queryParams.lineName=val;
        listSimpleEmisTransLine( this.queryParams).then(response => {
          this.optionItems = response.rows;
          this.optionItems.forEach(item => {
            this.filterMap[item.lineCode]=item;
          });
        });
      },
      reverseArrow(flag) {
        let rulesDom = this.$refs["selectRef"].$el.querySelector(
          ".el-input .el-input__suffix .el-input__suffix-inner .el-input__icon"
        ); // 找到dom
        if (flag) {
          rulesDom.classList.add("is-reverse"); // 对dom新增class
        } else {
          rulesDom.classList.remove("is-reverse"); // 对dom新增class
        }
      },

    }
  };
</script>