Vue is not defined 、

这个错误通常发生在使用 Vue.js 框架的时候，没有正确引入 Vue.js 库。需要确认下面几点：

1. 确认 Vue.js 是否被正确引入，并且在使用前已经加载完成。
2. 确认 Vue.js 的版本是否与当前代码兼容。
3. 确认 Vue.js 是否被正确安装，可以尝试重新安装 Vue.js。

如果以上方法都无法解决问题，可以尝试检查代码中是否有其他可能与 Vue.js 冲突的库。

相关问题

vue is not defined

The error "vue is not defined" typically occurs when you are trying to use Vue.js without properly including it in your project. To resolve this issue, make sure you have included the Vue.js library in your HTML file by adding the following script tag:

<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>

Alternatively, you can use a local copy of the Vue.js library by downloading it from the official website (https://vuejs.org) and including it in your project folder.

Once you have included the Vue.js library, ensure that you are referencing it correctly in your JavaScript code. You can do this by checking if the variable "Vue" is defined before using it. For example:

if (typeof Vue !== 'undefined') {
  // Your Vue.js code here
} else {
  console.error("Vue.js is not defined");
}

By following these steps, you should be able to resolve the "vue is not defined" error and use Vue.js in your project successfully.

Vue is not defined

回答: 当在正文中定义Vue时，有时会出现"Vue is not defined"的错误。这通常是因为在使用Vue之前没有正确导入Vue文件或者没有将Vue对象实例化。确保在使用Vue之前，正确导入Vue文件并创建Vue实例。另外，也要注意在定义Vue时，将其写为大写字母"Vue"，并在head部分导入文件，以确保代码的正常运行。