CLion 2018.2 Help

Run/Debug Configuration: React Native

Run | Edit Configurations | icons general add svg | React Native

In this dialog box, create configurations for running React Native applications.

Getting access to the Run/Debug Configuration: React Native dialog

  1. Install and enable the Node.js plugin as described in Managing Plugins.
  2. Download and install Node.js that contains the Node Package Manager(npm).

React Native-specific configuration settings

Build and launch application
  • Select the Build and launch checkbox if you are launching your application for the first time or if you have updated its native code since the last run.
  • Clear this checkbox if you haven't made any changes to the native code of your application since the last build. When you start debugging, CLion waits for you to open your application in the simulator with the Remote debug enabled as described on the React Native Official website.
  • If your application uses Expo, clear the checkbox because this bundler takes care of the process itself.
Platform In this area, choose the platform for which the application is intended. Depending on your choice, CLion will run the bundler with react-native run-ios or with react-native run-android.
  • To emulate the Android platform, use an Android virtual device.
  • To emulate the iOS platform, you need to install the ios-sim command line tool globally. You can do it through the Node Package Manager (npm), see npm and Yarn, or by running the sudo npm install ios-sim -g command, depending on your operating system.
Arguments In this text box, type the arguments to be passed to React Native, for example, specify the simulator type through the ‑‑simulator flag: ‑‑simulator="iPhone 4s".
Browser for debugging In debugging React Native applications, CLion relies on the Chrome runtime, which is used by React Native itself. You can also use DevTools together with CLion. When you initiate a debugging session, CLion starts a new Chrome instance and attaches to it.
Bundler port In this field, specify the port on which the bundler runs.
  • CLion automatically chooses 8081, which is default for the React Native bundler. Learn more from the React Native Official website.
  • If your application uses Expo, change the port to 19001.
Node interpreter In this field, specify the Node.js interpreter to use. If you choose the Project alias, CLion will automatically use the project default interpreter from the Node interpreter field on the Node.js and NPM page.

In most cases, CLion detects the project default interpreter and fills in the field itself. You can also choose another configured local interpreter or click browseButton and configure a new one.

React Native package In this field, specify the path to react-native-cli.
Working directory specify the working directory of the application. By default, the field shows the project root folder.
Environment variables In this field, optionally, type the environment variables for executing the react-native run-android or the react-native run-ios command.

Common options

When you edit a run configuration (but not a run configuration template), you can specify the following options for it:

Name In this text box, specify the name for the run/debug configuration. The name will help you identify the created configuration when you choose to edit it later, or when you invoke it, for example. from the Run popup (Shift+Alt+F10).
Share Select this check box to make the run/debug configuration available to other team members.

The shared run/debug configurations are kept in separate xml files under .idea\runConfigurations folder, while the local run/debug configurations are kept in the .idea\workspace.xml.


The tree view of run/debug configurations has a toolbar that helps you manage configurations available in your project as well as adjust default configurations templates.

icons general add svgAlt+InsertCreate a run/debug configuration.
icons general remove svgAlt+Delete Delete the selected run/debug configuration. Note that you cannot delete default configurations.
icons actions copy svg Ctrl+D Create a copy of the selected run/debug configuration. Note that you create copies of default configurations.
icons general settings svg Edit Templates View and edit the default template for the selected run/debug configuration. The templates are used for newly created configurations.
icons actions moveUp svg/icons actions moveDown svgAlt+Up/Alt+Down

Move the selected run/debug configuration up and down in the list.

The order of configurations in the list defines the order, in which the configurations appear when you choose a run/debug configuration.

Default templates of run/debug configurations are always sorted alphabetically.

icons actions newFolder svg Move into new folder / Create new folder

You can group run/debug configurations by placing them into folders.

To create a folder, select the configurations within a category, click folder, and specify folder name. If only a category is in focus, an empty folder is created.

Then, to move a configuration into a folder, between the folders or out of a folder, use drag-and-drop or icons actions moveUp svg and icons actions moveDown svg buttons.

To remove grouping, select a folder and click icons general remove svg.

icons objectBrowser sorted svg Sort configurations Click this button to sort configurations in the alphabetical order.


Under the Templates node in the tree view of run configurations, you can select a run configuration template and edit its default settings. This will not affect the configurations that are already created, but will be used as defaults when creating new configurations of the corresponding type.

When you select the Templates node itself, you will be able to adjust general settings that apply to all run/debug configurations:

Configurations available in Run Dashboard

In this section you can create a list of run configurations available in the Run Dashboard — a tool window that helps you execute and manage multiple run/debug configurations.

Note that the dashboard will only display the configuration types for which you have created one ore more configurations.
Thus, if you add a configuration type for which no configurations exist in the project, this type will not be displayed on the dashboard until you create a configuration of this type.

Generate run configurations for new CMake targets automatically Select this checkbox for automatic generation of the run configurations for the new targets, following the settings of the CMake Settings dialog. The run configuration is generated upon Reset CMake cache and reload a project action.
Delete run configurations for missing CMake targets automatically Enables automatic deletion of run/debug configurations for missing or obsolete targets.
Confirm rerun with process terminationThe behavior of this checkbox depends on whether the Single instance only option is selected for a particular run/debug configuration.
  • If this checkbox is selected, in case of a single instance, launching a new process (for example, by clicking icons toolwindows toolWindowRun on the main toolbar) while another process is still running, results in showing a dialog box prompting to terminate the current process before launching a new one.
  • If this checkbox is not selected (or in case of multiple instances), CLion starts the new process silently.
Temporary configurations limit Specify the maximum number of temporary configurations to be stored and shown in the Select Run/Debug Configuration drop-down list.

Before Launch options

In this area you can specify tasks that must be be performed before starting the selected run/debug configuration. The tasks are performed in the order they appear in the list.

icons general add svgAlt+Insert Click this icon to add one of the following available tasks:
  • Run External tool: select to run an external application. In the dialog that opens, select one or multiple applications you want to run. If it is not defined in CLion yet, add its definition. For more information, see Configuring Third-Party Tools and External Tools.
  • Run Another Configuration: select to execute another run/debug configuration. In the dialog that opens, select the configuration to be run.
  • Run File Watchers: select this option to have CLion apply all the currently active file watchers.
  • Run Grunt task: select this option to run a Grunt task. In the Grunt task dialog box that opens, specify the Gruntfile.js where the required task is defined, select the task to execute, and specify the arguments to pass to the Grunt tool.

    Specify the location of the Node.js interpreter, the parameters to pass to it, and the path to the grunt-cli package.

  • Run Gulp task: select this option to run a Gulp task. In the Gulp task dialog box that opens, specify the Gulpfile.js where the required task is defined, select the task to execute, and specify the arguments to pass to the Gulp tool.

    Specify the location of the Node.js interpreter, the parameters to pass to it, and the path to the gulp package.

  • Run npm Script: select this option to execute an npm script. In the NPM Script dialog box that opens, specify the npm run/debug configuration settings.
  • Compile TypeScript: select to run the built-in TypeScript compiler and thus make sure that all the changes you made to your TypeScript code are reflected in the generated JavaScript files. In the TypeScript Compile Settings dialog that opens, select or clear the Check errors checkbox to configure the behaviour of the compiler in case any errors are detected:
    • If the Check errors checkbox is selected, the compiler will show all the errors and the run configuration will not start.
    • If the Check errors checkbox is cleared, the compiler will show all the detected errors but the run configuration still will be launched.
  • Generate CoffeeScript Source Maps: select this option to generate the source maps for your CoffeeScript sources. In the dialog that opens, specify where your CoffeeScript source files are located.
icons general remove svgAlt+Delete Click this icon to remove the selected task from the list.
icons actions edit svg Enter Click this icon to edit the selected task. Make the necessary changes in the dialog that opens.
icons actions moveUp svg/icons actions moveDown svgAlt+Up/Alt+DownClick these icons to move the selected task one line up or down in the list. (The tasks are performed in the order that they appear in the list.)
Show this pageSelect this checkbox to show the run/debug configuration settings prior to actually starting the run/debug configuration.
Activate tool window

If this checkbox is selected, which it is by default, the Run or the Debug tool window opens when you start the run/debug configuration.

Otherwise, the tool window isn't shown. However, when the configuration is running, you can open the corresponding tool window for it yourself by pressing Alt+4 or Alt+5.

Last modified: 18 September 2018