<template>
  <div class="form-container">
    <el-form :model="ruleForm" :rules="rules" ref="ruleForm" label-width="100px" class="demo-ruleForm">
      <el-form-item label="活动名称" prop="name">
        <el-input v-model="ruleForm.name"></el-input>
      </el-form-item>
      <el-form-item label="活动区域" prop="region">
        <el-select v-model="ruleForm.region" placeholder="请选择活动区域">
          <el-option label="区域一" value="shanghai"></el-option>
          <el-option label="区域二" value="beijing"></el-option>
        </el-select>
      </el-form-item>
      <el-form-item label="活动时间" required>
        <el-col :span="11">
          <el-form-item prop="date1">
            <el-date-picker type="date" placeholder="选择日期" v-model="ruleForm.date1" style="width: 100%;"></el-date-picker>
          </el-form-item>
        </el-col>
        <el-col class="line" :span="2">-</el-col>
        <el-col :span="11">
          <el-form-item prop="date2">
            <el-time-picker placeholder="选择时间" v-model="ruleForm.date2" style="width: 100%;"></el-time-picker>
          </el-form-item>
        </el-col>
      </el-form-item>
      <el-form-item label="即时配送" prop="delivery">
        <el-switch v-model="ruleForm.delivery"></el-switch>
      </el-form-item>
      <el-form-item label="活动性质" prop="type">
        <el-checkbox-group v-model="ruleForm.type">
          <el-checkbox label="美食/餐厅线上活动" name="type"></el-checkbox>
          <el-checkbox label="地推活动" name="type"></el-checkbox>
          <el-checkbox label="线下主题活动" name="type"></el-checkbox>
          <el-checkbox label="单纯品牌曝光" name="type"></el-checkbox>
        </el-checkbox-group>
      </el-form-item>
      <el-form-item label="特殊资源" prop="resource">
        <el-radio-group v-model="ruleForm.resource">
          <el-radio label="线上品牌商赞助"></el-radio>
          <el-radio label="线下场地免费"></el-radio>
        </el-radio-group>
      </el-form-item>
      <el-form-item label="活动形式" prop="desc">
        <el-input type="textarea" v-model="ruleForm.desc"></el-input>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" @click="submitForm('ruleForm')">立即创建</el-button>
        <el-button @click="resetForm('ruleForm')">重置</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>

<script>
import {getStudentList, addOneStudent} from '@/api/student'

export default {
  name: "studentAdd",
  data() {
    return {
      ruleForm: {
        name: '',
        region: '',
        date1: '',
        date2: '',
        delivery: false,
        type: [],
        resource: '',
        desc: ''
      },
      rules: {
        // name: [
        //   { required: true, message: '请输入活动名称', trigger: 'blur' },
        //   { min: 3, max: 5, message: '长度在 3 到 5 个字符', trigger: 'blur' }
        // ],
        // region: [
        //   { required: true, message: '请选择活动区域', trigger: 'change' }
        // ],
        // date1: [
        //   { type: 'date', required: true, message: '请选择日期', trigger: 'change' }
        // ],
        // date2: [
        //   { type: 'date', required: true, message: '请选择时间', trigger: 'change' }
        // ],
        // type: [
        //   { type: 'array', required: true, message: '请至少选择一个活动性质', trigger: 'change' }
        // ],
        // resource: [
        //   { required: true, message: '请选择活动资源', trigger: 'change' }
        // ],
        // desc: [
        //   { required: true, message: '请填写活动形式', trigger: 'blur' }
        // ]
      }
    };
  },
  mounted () {
    const _this = this

  },
  methods: {
    submitForm(formName) {

      let paramAdd = {
        "name": "聚链212",
        "age": 550
      }
      addOneStudent(paramAdd).then(data=>{
        console.log('add data == ', data)
      }).catch(err=>{

      })

      this.$refs[formName].validate((valid) => {
        if (valid) {
          // alert('submit!');
        } else {
          console.log('error submit!!');
          return false;
        }
      });
    },
    resetForm(formName) {
      this.$refs[formName].resetFields();
    }
  }
}
</script>

<style scoped>
  .form-container {
    background: rgb(240, 242, 245);
    /*background: #F56C6C;*/
    box-sizing: border-box;
    padding: 10px 10px 0 10px;
    height: 100%;
  }
</style>

这个和element没什么关系吧，把height注释了或者auto来试试吧

可以试试直接在白色区域检查元素，然后把检查所得元素的背景色设为与内容区背景一致。

可以在mounted时动态计算一个最小高度，设置样式

this.$wrapper.style['min-height'] = '100px'

min-height: calc( 100vh - ??px)