elementui 日期组件设置value-format年月日格式时报错Error in event handler for “el.form.blur“: “TypeError: dateObje

给日期指定返回格式为yyyy-MM-dd时，报错 Error in event handler for “el.form.blur”: “TypeError: dateObject.getTime is not a function”

 <el-date-picker
     v-model="ruleForm.time"
     type="date"
     placeholder="选择日期"
     format="yyyy-MM-dd"
     value-format="yyyy-MM-dd"
     ref="selectdate"
     :disabled="false">
 </el-date-picker>

这时因为表单校验格式的问题导致

rules: {
  time: [
    { type: 'date', required: true, message: '请选择日期', trigger: ['blur', 'change'] }
  ],
},

把type：‘date’ 改为 type: ‘string’