vue.esm.js?efeb:628 [Vue warn]: Failed to mount component: template or render function not defined. found in ---> <Login> at src/views/Login.vue <App> at src/App.vue <Root>

解决方法

我在网上看到好多解决方案，但都没有找到解决方法。我是第一次接触element-ui。怎么引用组件也不清楚，问题就出现在引入组件上

<el-form :model="ruleForm" status-icon :rules="rules" ref="ruleForm" label-width="100px" class="demo-ruleForm">
    <el-form-item label="密码" prop="pass">
      <el-input type="password" v-model="ruleForm.pass" autocomplete="off"></el-input>
    </el-form-item>
    <el-form-item label="确认密码" prop="checkPass">
      <el-input type="password" v-model="ruleForm.checkPass" autocomplete="off"></el-input>
    </el-form-item>
    <el-form-item label="年龄" prop="age">
      <el-input v-model.number="ruleForm.age"></el-input>
    </el-form-item>
    <el-form-item>
      <el-button type="primary" @click="submitForm('ruleForm')">提交</el-button>
      <el-button @click="resetForm('ruleForm')">重置</el-button>
    </el-form-item>
  </el-form>

这上面是模板块，需要一个模板标签

<template>
  <el-form :model="ruleForm" status-icon :rules="rules" ref="ruleForm" label-width="100px" class="demo-ruleForm">
    <el-form-item label="密码" prop="pass">
      <el-input type="password" v-model="ruleForm.pass" autocomplete="off"></el-input>
    </el-form-item>
    <el-form-item label="确认密码" prop="checkPass">
      <el-input type="password" v-model="ruleForm.checkPass" autocomplete="off"></el-input>
    </el-form-item>
    <el-form-item label="年龄" prop="age">
      <el-input v-model.number="ruleForm.age"></el-input>
    </el-form-item>
    <el-form-item>
      <el-button type="primary" @click="submitForm('ruleForm')">提交</el-button>
      <el-button @click="resetForm('ruleForm')">重置</el-button>
    </el-form-item>
  </el-form>
</template>

大功告成