How to enable @ experimentalDecorators in next. Config . Js

First, ensure that Next.js is installed in your project and that you have a next.config.js configuration file. If not, create one using the following command:

bash
touch next.config.js

Next, enable decorator support in the next.config.js file by using the experimental key to modify Next.js's default configuration. Your next.config.js file should look like this:

javascript
module.exports = {
  experimental: {
    // Enable decorator support
    decorators: true
  }
}

You also need to ensure your project uses the correct Babel plugins to transform decorator syntax. Install the @babel/plugin-proposal-decorators and @babel/plugin-proposal-class-properties plugins:

bash
npm install @babel/plugin-proposal-decorators @babel/plugin-proposal-class-properties --save-dev

Configure these plugins in your .babelrc or babel.config.js file. If you don't have these files, create a .babelrc file:

bash
touch .babelrc

Then configure Babel to use these plugins:

json
{
  "presets": ["next/babel"],
  "plugins": [
    ["@babel/plugin-proposal-decorators", { "legacy": true }],
    ["@babel/plugin-proposal-class-properties", { "loose": true }]
  ]
}

Ensure @babel/plugin-proposal-decorators appears before @babel/plugin-proposal-class-properties. This configuration uses legacy decorator syntax and loose mode for class properties.

After that, you can use decorators in your Next.js project.

Note that this feature is experimental and may change in future Next.js versions. Always consult the latest official documentation for the most accurate information. Additionally, experimental features may introduce stability issues, so use them with caution in production environments.