Dart: How to use different settings in debug and production mode?

Question

Any ideas how I can configure the Dart application to use different settings in debug mode (works in Dartium) and in production mode?

For example, I use PouchDb in my application, which replicates the database to a specific CouchDb instance with the specified URL: db.replicateTo(url); In debug mode, I would like to use a different instance of CouchDb (different URL) than in production mode.

So, are there any ideas or approaches to use different settings in both modes?

Answer 1

this works after a while:

transformers: # or dev_transformers
- $dart2js:
  environment: { PROD: "true" }

access it from code for example

String.fromEnvironment()

main() {
  print('PROD: ${const String.fromEnvironment('PROD')}'); 
  // works in the browser
  // prints 'PROD: null' in Dartium
  // prints 'PROD: true' in Chrome
}

see also

• Configuring the built-in dart2js Transformer
• , ​​
• https://github.com/dart-lang/pub/issues/798
• http://blog.sethladd.com/2013/12/compile-time-dead-code-elimination-with.html
• https://api.dartlang.org/stable/1.22.0/dart-core/bool/bool.fromEnvironment.html
• dart