Component template should contain exactly one root element. If you are using v-if on multiple elements, use v-else-if to chain them instead.

vue项目中遇到

Component template should contain exactly one root element. If you are using v-if on multiple elements, use v-else-if to chain them instead.

页面代码

<template>

    <img src= '../assets/logo.png' />
    <el-form :model="ruleForm" :rules="rules" ref="ruleForm" label-width="100px" class="demo-ruleForm">
      <el-form-item label="" prop="username">
        <el-input v-model="ruleForm.username"></el-input>
      </el-form-item>
      <el-form-item label="" prop="password">
        <el-input v-model="ruleForm.password"></el-input>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" @click="submitForm('ruleForm')">登录</el-button>
      </el-form-item>
    </el-form>

</template>

解决方法：

<template>
  <div> // 用div 把代码包裹起来
    <img src= '../assets/logo.png' />
    <el-form :model="ruleForm" :rules="rules" ref="ruleForm" label-width="100px" class="demo-ruleForm">
      <el-form-item label="" prop="username">
        <el-input v-model="ruleForm.username"></el-input>
      </el-form-item>
      <el-form-item label="" prop="password">
        <el-input v-model="ruleForm.password"></el-input>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" @click="submitForm('ruleForm')">登录</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>