Solving `Uncaught (in promise) ReferenceError: exports is not defined` in Nuxt.js with Vee-Validate

When using vee-validate in a Nuxt.js project, I encountered the following error:

<code>Uncaught (in promise) ReferenceError: exports is not defined</code>

This is not an uncommon problem! This error is usually caused by incorrect transpilation of the vee-validate library, which uses modern ES modules. This article explains how to fix this problem and make sure everything runs smoothly.

---

Error reason

This error occurs because Nuxt.js (especially when running in SSR mode) sometimes requires explicit instructions to transpile modern libraries like vee-validate. Without these directives, the library might try to use exports (a CommonJS feature) in an ES module context, causing errors.

---

Solution

1. Ensure version compatibility

Before making configuration changes, please confirm that you are using the correct version of Nuxt and Vue:

• Nuxt 3 Vue 3: Use vee-validate v4.
• Nuxt 2 Vue 2: Use vee-validate v3 unless you are using the Vue Composition API plugin, which works with v4.

---

2. Translation Vee-Validate

Add vee-validate to the nuxt.config options in your transpile file.

For Nuxt 3:

<code>// nuxt.config.ts
export default defineNuxtConfig({
  build: {
    transpile: ['vee-validate']
  }
})</code>

For Nuxt 2:

<code>// nuxt.config.js
export default {
  build: {
    transpile: ['vee-validate']
  }
}</code>

This will ensure that Nuxt converts vee-validate correctly for both client and server environments.

---

3. Example of form settings using Vee-Validate

Here's a quick example of schema validation using vee-validate and yup in Nuxt 3:

<code>import { useForm, useField } from 'vee-validate'
import * as yup from 'yup'

// 定义验证模式
const formSchema = yup.object({
  email: yup.string().required('Email is required').email('Invalid email'),
  password: yup.string().required('Password is required').min(6, 'Password must be at least 6 characters')
})

// 使用模式初始化表单
const { handleSubmit, errors } = useForm({
  validationSchema: formSchema
})

// 定义表单字段
const { value: email, errorMessage: emailError } = useField('email')
const { value: password, errorMessage: passwordError } = useField('password')

// 处理表单提交
const onSubmit = handleSubmit((values) => {
  console.log('Form values:', values)
})
<template>
    <div>
      <label for="email">Email</label>
      <hr></hr><h3>


4. **检查您的 Node 版本**
</h3>

<p>确保您正在运行 <strong>Node.js 14 或更高版本</strong>，因为较旧的版本可能无法很好地处理现代 ES 模块语法。</p>


<hr></hr><h2>

最终总结
</h2>

<p>通过将 vee-validate 添加到 transpile 配置中，您可以避免令人沮丧的“exports is not defined”错误，并在您的 Nuxt.js 项目中充分利用 vee-validate 的强大功能。如果您仍然遇到问题，请仔细检查您的软件包版本和项目设置。</p>

<p>祝您编码愉快！?</p>


<hr></hr><h3>

相关链接
</h3>

<ul><li>Vee-Validate 文档</li>
<li>Nuxt.js 转译指南</li>
</ul><p>有问题？请留言或分享您的经验！</p>


          </div>


        </template></code>

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