Visual Studio Code

Installation and setup


Follow the Set up an editor instructions to install the Dart and Flutter extensions (also called plugins).

Updating the extension


Updates to the extensions are shipped on a regular basis. By default, VS Code automatically updates extensions when updates are available.

To install updates yourself:

  1. Click Extensions in the Side Bar.
  2. If the Flutter extension has an available update, click Update and then Reload.
  3. Restart VS Code.

Creating projects


There are a couple ways to create a new project.

Creating a new project


To create a new Flutter project from the Flutter starter app template:

  1. Go to View > Command Palette....

    You can also press Ctrl / Cmd + Shift + P.

  2. Type flutter.

  3. Select the Flutter: New Project.

  4. Press Enter.

  5. Select Application.

  6. Press Enter.

  7. Select a Project location.

  8. Enter your desired Project name.

Opening a project from existing source code


To open an existing Flutter project:

  1. Go to File > Open.

    You can also press Ctrl / Cmd + O

  2. Browse to the directory holding your existing Flutter source code files.

  3. Click Open.

Editing code and viewing issues


The Flutter extension performs code analysis. The code analysis can:

  • Highlight language syntax

  • Complete code based on rich type analysis

  • Navigate to type declarations

    • Go to Go > Go to Definition.
    • You can also press F12.
  • Find type usages.

    • Press Shift + F12.
  • View all current source code problems.

    • Go to View > Problems.
    • You can also press Ctrl / Cmd + Shift + M.
    • The Problems pane displays any analysis issues:
      Problems pane

Running and debugging


Start debugging by clicking Run > Start Debugging from the main IDE window, or press F5.

Selecting a target device


When a Flutter project is open in VS Code, you should see a set of Flutter specific entries in the status bar, including a Flutter SDK version and a device name (or the message No Devices):
VS Code status bar

The Flutter extension automatically selects the last device connected. However, if you have multiple devices/simulators connected, click device in the status bar to see a pick-list at the top of the screen. Select the device you want to use for running or debugging.

Run app without breakpoints


Go to Run > Start Without Debugging.

You can also press Ctrl + F5.

Run app with breakpoints

  1. If desired, set breakpoints in your source code.

  2. Click Run > Start Debugging. You can also press F5. The status bar turns orange to show you are in a debug session.
    Debug console

    • The left Debug Sidebar shows stack frames and variables.
    • The bottom Debug Console pane shows detailed logging output.
    • Debugging is based on a default launch configuration. To customize, click the cog at the top of the Debug Sidebar to create a launch.json file. You can then modify the values.

Run app in debug, profile, or release mode


Flutter offers many different build modes to run your app in. You can read more about them in Flutter's build modes.

  1. Open the launch.json file in VS Code.

    If you don't have a launch.json file:

    1. Go to View > Run.

      You can also press Ctrl / Cmd + Shift + D

      The Run and Debug panel displays.

    2. Click create a launch.json file.

  2. In the configurations section, change the flutterMode property to the build mode you want to target.

    For example, if you want to run in debug mode, your launch.json might look like this:

    "configurations": [
        "name": "Flutter",
        "request": "launch",
        "type": "dart",
        "flutterMode": "debug"
  3. Run the app through the Run panel.

Fast edit and refresh development cycle


Flutter offers a best-in-class developer cycle enabling you to see the effect of your changes almost instantly with the Stateful Hot Reload feature. To learn more, check out Hot reload.

Advanced debugging


You might find the following advanced debugging tips useful:

Debugging visual layout issues


During a debug session, several additional debugging commands are added to the Command Palette and to the Flutter inspector. When space is limited, the icon is used as the visual version of the label.

Toggle Baseline Painting Baseline painting icon
Causes each RenderBox to paint a line at each of its baselines.
Toggle Repaint Rainbow Repaint rainbow icon
Shows rotating colors on layers when repainting.
Toggle Slow Animations Slow animations icon
Slows down animations to enable visual inspection.
Toggle Debug Mode Banner Debug mode banner icon
Hides the debug mode banner even when running a debug build.

Debugging external libraries


By default, debugging an external library is disabled in the Flutter extension. To enable:

  1. Select Settings > Extensions > Dart Configuration.
  2. Check the Debug External Libraries option.

Editing tips for Flutter code


If you have additional tips we should share, let us know!

Assists & quick fixes


Assists are code changes related to a certain code identifier. A number of these are available when the cursor is placed on a Flutter widget identifier, as indicated by the yellow lightbulb icon. To invoke the assist, click the lightbulb as shown in the following screenshot:

Code assists

You can also press Ctrl / Cmd + .

Quick fixes are similar, only they are shown with a piece of code has an error and they can assist in correcting it.

Wrap with new widget assist
This can be used when you have a widget that you want to wrap in a surrounding widget, for example if you want to wrap a widget in a Row or Column.
Wrap widget list with new widget assist
Similar to the assist above, but for wrapping an existing list of widgets rather than an individual widget.
Convert child to children assist
Changes a child argument to a children argument, and wraps the argument value in a list.
Convert StatelessWidget to StatefulWidget assist
Changes the implementation of a StatelessWidget to that of a StatefulWidget, by creating the State class and moving the code there.



Snippets can be used to speed up entering typical code structures. They are invoked by typing their prefix, and then selecting from the code completion window: Snippets

The Flutter extension includes the following snippets:

  • Prefix stless: Create a new subclass of -StatelessWidget`.
  • Prefix stful: Create a new subclass of StatefulWidget and its associated State subclass.
  • Prefix stanim: Create a new subclass of StatefulWidget, and its associated State subclass including a field initialized with an AnimationController.

You can also define custom snippets by executing Configure User Snippets from the Command Palette.

Keyboard shortcuts

Hot reload

To perform a hot reload during a debug session, click Hot Reload on the Debug Toolbar.

You can also press Ctrl + F5 (Cmd + F5 on macOS).

Keyboard mappings can be changed by executing the Open Keyboard Shortcuts command from the Command Palette.

Hot reload vs. hot restart


Hot reload works by injecting updated source code files into the running Dart VM (Virtual Machine). This includes not only adding new classes, but also adding methods and fields to existing classes, and changing existing functions. A few types of code changes cannot be hot reloaded though:

  • Global variable initializers
  • Static field initializers
  • The main() method of the app

For these changes, restart your app without ending your debugging session. To perform a hot restart, run the Flutter: Hot Restart command from the Command Palette.

You can also press Ctrl + Shift + F5 or Cmd + Shift + F5 on macOS.



Known issues and feedback


All known bugs are tracked in the issue tracker: Dart and Flutter extensions GitHub issue tracker. We welcome feedback, both on bugs/issues and feature requests.

Prior to filing new issues:

  • Do a quick search in the issue trackers to see if the issue is already tracked.
  • Make sure you are up to date with the most recent version of the plugin.

When filing new issues, include flutter doctor output.