el-form 表单检验，提交的时候只校验部分

<template>
  <div>
    <el-form ref="dataFrom" :model="dataFrom" :rules="rules">
      <el-form-item label="用户名">
        <el-input v-model="dataFrom.userName"></el-input>
      </el-form-item>
    </el-form>
    <el-button @click="submitData()">&nbsp;&nbsp;提交</el-button>
  </div>
</template>

<script>
  export default {
    name: "settlementSignReport",
    data() {
      return {
        dataFrom: {
          userName: ''
        },
        rules: {
          userName: [
            {required: true, message: '请输入用户名', trigger: 'blur'},
          ]
        }
      }
    },
    methods: {
      submitData() {
        this.$refs['dataFrom'].validateField('userName', valid => {
          if (!valid) {
            alert(123)
          } else {
            alert(321)
          }
        })
      }
    }
  }
</script>

重点是：用form 表单验证 validate 的 validateField 去验证指定的

如果要验证整个表单：

 this.$refs['dataFrom'].validate((valid)=>{
    if(valid){
        //验证通过
    }
 })