CLion 2021.1 Help

Webpack

CLion integrates with the webpack module bundler. This support improves coding assistance in JavaScript files by taking into account webpack module resolution and resolve aliases.

In projects that consist of multiple modules with different webpack configurations, CLion can automatically detect the relevant configuration file for each module and use the module resolution rules from it, see Specifying the webpack configuration file to use below.

For webpack version 2 and later, CLion provides code completion and quick documentation look-up for options in webpack configuration files.

Before you start

Download and install Node.js.

Configuring webpack in CLion

Add webpack to your package.json

  • Make sure webpack is listed in the dependencies or devDependencies object of your package.json.

    If webpack is missing, open the embedded Terminal (Alt+F12) and type:

    npm install --save-dev webpack

Create webpack configuration files

  • Create one or several configuration files depending on your project structure (New | JavaScript file ). Learn more from the webpack official website.

Specify the webpack configuration files to use

Based on the analysis of a webpack configuration file, CLion understands the webpack configuration, resolves modules, and provides coding assistance in JavaScript files, see Resolving modules below.

In CLion, you can choose between two configuration modes - automatic and manual.

With automatic configuration, CLion auto-detects the relevant webpack configuration file for each JavaScript file.

With manual configuration, you specify the webpack configuration file to use in your project. Manual configuration is useful if the name of your webpack configuration file is not recognized by CLion, see the list of recognized webpack config names below.

Choose how to detect webpack configuration

  1. Open the Settings/Preferences dialog Ctrl+Alt+S and go to Languages and Frameworks | JavaScript | Webpack.

  2. Select one of the following options:

    • Automatic Webpack configuration: In this mode, for a JavaScript file, CLion will first look for a webpack configuration file in the folder where this JavaScript file is located, then in its parent folder, and so on.

      As a result, if your project consists of multiple modules with different webpack configurations, each module will use the module resolution rules from its own webpack configuration file (if such config is found).

      CLion recognizes JavaScript or TypeScript webpack configuration files with the following names and in the following order:

      • webpack.config.js/ webpack.config.ts

      • webpack.base.conf.js/ webpack.base.conf.ts

      • webpack.dev.conf.js/ webpack.dev.conf.ts

      • webpack.prod.conf.js/ webpack.prod.conf.ts

      • webpack.base.config.js/ webpack.base.config.ts

      • webpack.dev.config.js/ webpack.dev.config.ts

      • webpack.prod.config.js/ webpack.prod.config.ts

      • webpack.babel.js/ webpack.babel.ts

    • Manual Webpack configuration: In the Configuration file field, specify the location of the webpack config to use.

      In this mode, the resolution rules from the specified configuration file will be applied to all modules in your project.

      Select this option if the name of your webpack configuration file is not recognized by CLion, see the list of recognized webpack config names above.

See also Getting Started on the webpack official website.

Editing a webpack configuration file

For webpack version 2 and later, CLion provides code completion and documentation look-up in the configuration object of webpack configuration files. Code completion is provided on the fly. To view documentation for a symbol, press Ctrl+Q.

Editing a webpack configuration file

Project security

When you open a webpack project, CLion executes the webpack configuration file, which may potentially contain some untrusted code. To avoid problems, when you open a project for the first time CLion displays a warning and lets you decide on how to proceed.

Untrusted project warning

If you click Skip, CLion disables webpack in the current project. To re-enable it, open the Settings/Preferences dialog Ctrl+Alt+S, go to Languages and Frameworks | JavaScript | Webpack, and select automatic or manual detection for webpack configuration, see Specify the webpack configuration files to use above.

Webpack disabled

Trusted locations

You can configure what sources CLion should consider safe.

  1. In the Settings/Preferences dialog Ctrl+Alt+S, go to Build, Execution, Deployment | Trusted Locations.

  2. On the Trusted Locations page, create a list of local directories where the projects you consider trusted reside. Click OK to save the changes.

    Webpack: Trusted Locations

    CLion loads projects from those locations without showing any security notifications.

Resolving modules

When you open a project or edit a webpack configuration file (either auto-detected or specified on Settings/Preferences | Languages and Frameworks | JavaScript | Webpack ), CLion analyses the configuration in the background and, based on the received information, properly understands the project resolve roots and resolve aliases. Thanks to this understanding of the project configuration, CLion provides more precise code completion for imports and exported symbols in JavaScript files. As a result, everything works fine without any steps from your side.

The image below illustrates module resolution in a project where react-color is an alias for the path './src/index.js'. CLion properly resolves the import from react-color, provides navigation to it and completion for the exported symbols:

Module resolution for aliases

Debugging applications that use webpack

You can debug applications that use webpack same way as you debug any JavaScript client-side application, see Debugging React apps created with Create React App and Debugging Angular apps created with Angular CLI.

Last modified: 02 April 2021