Get Started

Follow these steps to start using Dart to develop web apps. First you’ll play with Dart in your browser, no download required. Then you’ll install Dart and build a small web app.

1. Play with a web app in DartPad

With DartPad you can experiment with the Dart language and APIs, no download necessary.

For example, here’s an embedded DartPad that lets you play with the code for a todo-list generator. Click run to run the app; the console output appears beneath the code. Try editing the source code—perhaps you’d like to add “horses” to the list of pets. To get the full DartPad experience, which includes the web UI that the app produces, open the example at

More information:

2. Install Dart

Once you’re ready to move beyond DartPad and develop real apps, you need the Dart SDK.

As you install, note the path to the SDK. You’ll need it in step 4.

Use Chocolatey to install a stable release of the Dart SDK:

  C:\> choco install dart-sdk

You can use Aptitude to install the Dart SDK on Linux.

  1. Perform the following one-time setup:
    > sudo apt-get update
    > sudo apt-get install apt-transport-https
    > sudo sh -c 'curl | apt-key add -'
    > sudo sh -c 'curl > /etc/apt/sources.list.d/dart_stable.list'
  2. Install the Dart SDK:
    > sudo apt-get update
    > sudo apt-get install dart

With Homebrew, installing Dart is easy.

  > brew tap dart-lang/dart
  > brew install dart

More information: Install the SDK

3. Get CLI tools or WebStorm (or both)

If you like to use the command line, install webdev and stagehand:

> pub global activate webdev
> pub global activate stagehand

web Although using an IDE is optional, we highly recommend that you download and install WebStorm. WebStorm comes with Dart support, making it easy to write correct Dart code and to run it in a browser.

More information: Dart tools for the web

4. Create a web app

To create a web app from the command line, use these commands:

> mkdir quickstart
> cd quickstart
> stagehand web-simple
> pub get

web Here’s how to use WebStorm to create the same web app:

  1. Choose Create New Project from WebStorm’s welcome screen, or File > New > Project… from the menu. A dialog appears.
  2. Choose Dart from the list on the left.
  3. If the Dart SDK path field doesn’t have a value, enter it.
  4. Edit the Location field to set the app location and name.
  5. Select Generate sample content to show the list of templates.
  6. Choose the Bare-bones Web App template.
  7. Click Create.
    WebStorm new project dialog

More information: Overview of Dart web libraries

5. Run the app

To run the app from the command line, use webdev to build and serve the app:

> webdev serve

Then, to view your app, use the Chrome browser to visit localhost:8080. (Details about Dart’s browser support are in the FAQ.) Webdev is slowest when it builds and serves your app for the first time. After that, assets are cached on disk and incremental builds are much faster.

web To run the app from WebStorm, do the following:

  1. Right-click the app’s web/index.html file in the project view.
  2. Choose Run ‘index.html’ in the pop up menu.

Running the app from WebStorm

Once your app has compiled, the browser should display “Your Dart app is running.”

Launched bare-bones app

6. Add custom code to the app

Let’s customize the app you just created.

  1. Copy the thingsTodo() function from the DartPad above to the web/main.dart file.

  2. In the main() method, initialize the output element using thingsTodo():

    void main() {
      Element output = querySelector('#output');
    LIElement newLI(String itemText) => LIElement()..text = itemText;
    Iterable<String> thingsTodo() sync* { ... }
  3. Save your changes.

  4. WebStorm and webdev automatically rebuild your app. Refresh the app’s browser window. Now your simple Dart app has a todo list! It should look something like this:
    Running the revised app

  5. Optionally, improve the formatting by editing web/styles.css, then reload the app to check your changes.

    #output {
      padding: 20px;
      text-align: left;

7. Use DevTools to inspect the app

Use Chrome DevTools to set breakpoints, view values and types, and step through your app’s Dart code. For setup details and a walkthrough, see Debugging Dart Web Apps.

What next?

Check out these resources:

If you get stuck, find help at Community and Support.