自定义一个表单组件
然后使用自定义验证,

range: [
          {
            validator: valiRange,
            trigger: "change"
          }
        ],
var valiRange = (rule, value, callback) => {
        console.log(value) //这个是上一次旧的值,
        //data里的值form已经更新了 这是怎么回事
     

     diy.vue
<template>
  <div>
    <el-radio-group v-model="storeType" @change="onTypeChange">
    ....
    </el-radio-group>
  </div>
</template>
 props: {
    value: Object,
    default: () => ({
      type: 1,
      list: []
    })
  },
  data() {
    return {
      storeType: this.value.type,
      tags: [],
      selectList: this.value.list
    };
  },
  methods: {
    onTypeChange(value) {
      alert(value)
      this.storeType = value;
      this.selectList = [];
      const v = {
        type: value,
        list: []
      }
      this.$emit("input", v);  // 值已经发出去了,父组件的form里的字段也更新了,但是校验的还是上次的值,落后一步啊?
    },