To upgrade the project manually, you will have to first upgrade the project dependencies to their latest versions. You cannot use an old version of a Vue ecosystem plugin with Vue 3. To do this, perform the following steps:
- We need to upgrade the Vue framework, the ESLint plugin (which Vue depends on), and the vue-loader for the bundler. To upgrade it, you need to open Terminal (macOS or Linux) or Command Prompt/PowerShell (Windows) and execute the following command:
> npm install vue@next eslint-plugin-vue@next vue-loader@next
- We need to add the new Vue single-file component compiler as a dependency to the project. To install it, you need to open Terminal (macOS or Linux) or Command Prompt/PowerShell (Windows) and execute the following command:
> npm install @vue/compiler-sfc@latest
- If you are using unit tests and the @vue/test-utils package on your project, you will also need to upgrade this dependency. To upgrade it, you need to open Terminal...
