[JavaScript知识库]vue 根据下拉框 值 进行数据联动

<template>
  <div class="div">
    <el-select v-model="value" @change="opt" placeholder="请选择">
      <el-option
        v-for="item in data"
        :key="item.value"
        :label="item.name"
        :value="item.value"
      >
      </el-option>
    </el-select>
    <el-input class="ipt" v-model="form.ipt1" placeholder="请输入" />
    <el-input class="ipt" v-model="form.ipt2" placeholder="请输入" />
    <el-input class="ipt" v-model="form.ipt3" placeholder="请输入" />
  </div>
</template>

<script>
export default {
  data() {
    return {
      form: {
        ipt1: "",
        ipt2: "",
        ipt3: "",
      },
      data: [
        {
          id: 1,
          value: "value1",
          label: "label1",
          name: "name1",
          num: 11,
        },
        {
          id: 2,
          value: "value2",
          label: "label2",
          name: "name2",
          num: 22,
        },
        {
          id: 3,
          value: "value3",
          label: "label3",
          name: "name3",
          num: 33,
        },
        {
          id: 4,
          value: "value4",
          label: "label4",
          name: "name4",
          num: 44,
        },
      ],
      value: "name1",
    };
  },
  mounted() {
    this.data.forEach((v) => {
      if (v.name == this.value) {
        this.form.ipt1 = v.label;
        this.form.ipt2 = v.name;
        this.form.ipt3 = v.num;
      }
      return false;
    });
  },
  methods: {
    opt(val) {
      this.data.forEach((v) => {
        if (v.value == val) {
          this.form.ipt1 = v.label;
          this.form.ipt2 = v.name;
          this.form.ipt3 = v.num;
        }
         return false;
      });
    },
  },
  // watch:{
  //   // value(newVal,oldVal){
  //   //   console.log(newVal,oldVal);

  //   // }
  // }
};
</script>

<style lang="less" scoped>
.div {
  width: 300px;
  .ipt {
    margin: 10px 0;
  }
}
</style>