Maintaining Dart and JavaScript Side by Side
As Dart and dart2js evolve, the performance of the generated JavaScript will improve. At this early stage, Dart code compiled to JavaScript rivals and sometimes surpasses code a typical JavaScripter might write.[12] But as fast as the compiled JavaScript gets, it will never be as fast as running Dart natively.
The question then becomes, how can we send Dart code to Dart-enabled browsers and send the compiled JavaScript to other browsers?
The answer is relatively simple: include a small JavaScript snippet that detects the absence of Dart and loads the corresponding JavaScript. As you saw in the previous section, if we compile a main.dart script, then dart2js will produce a corresponding main.dart.js ...
Get Dart 1 for Everyone now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
