DartPad

DartPad is a free, open-source online editor to help developers learn about Dart and Flutter. You can access it at dartpad.dev.

Try out the next version of DartPad! A new version of DartPad is available to try at preview.dartpad.dev! This is a new client built using Flutter, and it will replace the current one very soon. To learn more and share your feedback, see issue #2808.

What's here?

Repo packages:

Package	Description	CI Status
dart_pad	The front end of DartPad.
dart_services	The backend service for DartPad.
dartpad_shared	Shared code between the DartPad frontend and backend.
samples	Sample code snippets for DartPad.
sketch_pad	An experimental redux of the DartPad UI.

Background

DartPad began as an online playground for the Dart language built by the Dart tools team in 2015. It compiles, analyzes, and displays the results of its users' Dart code, and can be embedded in other websites as an iframe.

In Dec 2019, we launched a new version of DartPad (dartpad.dev) with a fresh new look-and-feel and support for the popular Flutter UI toolkit. To learn more about the new DartPad, please check this blog post. Interested in embedding DartPad in your websites? Check out this embedding guide.

Additional docs

Some handy guides:

• Sharing Guide
• Embedding Guide

Issues and bugs

Please file reports on the GitHub Issue Tracker.

Bug triage priorities

Each issue in the tracker will be assigned a priority based on the impact to users when the issue appears and the number of users impacted (widespread or rare).

Some examples of likely triage priorities:

• P0
  • Broken internal/external navigation links within DartPad
  • JavaScript console errors indicating problems with DartPad functionality in many cases, widespread.
  • App is down / not loading
  • Interface bugs preventing all or almost all uses of the application
  • Unable to compile or analyze valid Flutter/Dart code (widespread and/or with error messages that aren't retryable)
• P1
  • Unable to compile or analyze valid Flutter/Dart code in edge cases only, and/or retryable
  • Incorrect or not up-to-date warning information for invalid Flutter/Dart code (widespread)
  • Interface bugs interfering with common uses of the application, widespread
  • JavaScript console errors indicating problems with DartPad functionality (edge cases / not widespread)
  • Enhancements that have significant data around them indicating they are a big win
  • User performance problem (e.g. app loading / run / analysis), widespread
• P2
  • Incorrect or not up-to-date warning information for invalid Flutter/Dart code (edge cases / not widespread)
  • JavaScript errors not resulting in visible problems outside of the console (widespread)
  • Interface bugs interfering with the use of the application in edge cases.
  • User interface and display warts that are not significantly impacting functionality, widespread
  • Enhancements that are agreed to be a good idea even if they don't have data around them indicating they are a big win
  • User performance problem (for example, app loading / run analysis), edge cases / not widespread
• P3
  • Minor user interface warts not significantly impacting functionality, on edge cases only.
  • JavaScript errors not resulting in visible problems outside of the console (edge cases)
  • Enhancements that are speculative or where we are unsure of impacts/tradeoffs

License and Contributing

Contributions welcome! Please read this short guide first. You can view our license here.