vue3 require is not defined

The error "require is not defined" typically occurs in Vue 3 because it uses ES modules (import/export) by default instead of CommonJS (require/module.exports) syntax.

To resolve this issue, you can either:
1. Use import/export syntax: Replace `require()` with `import` and `module.exports` with `export`.
Example:

// Before
const Vue = require('vue');
module.exports = Vue;

// After
import Vue from 'vue';
export default Vue;

2. Use a bundler like webpack: If you're using Vue in a project bundled with webpack, make sure you have the appropriate webpack configuration to handle ES modules.

3. Use a tool like Babel: If you prefer to use require and module.exports syntax in your Vue 3 project, you can configure Babel to transform ES modules into CommonJS syntax.

Note that the specific solution depends on your project setup and requirements. Make sure to refer to the official Vue 3 documentation and the documentation of your chosen bundler or build tool for more detailed instructions.