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Tag: dart2js

August 26, 2022 Flutter

What's the most efficient way to make a single-item Iterable in Dart?

Issue In Dart, single-item iterables can be created in various ways. [‘item’]; // A single-item list Iterable.generate(1, (_) => ‘item’); // A single-item generated Iterable How do these methods compare in terms of speed and memory usage, during both creation

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March 27, 2022 Flutter

Bitwise operations, wrong result in Dart2Js

Issue I’m doing ZigZag encoding on 32bit integers with Dart. This is the source code that I’m using: int _encodeZigZag(int instance) => (instance << 1) ^ (instance >> 31); int _decodeZigZag(int instance) => (instance >> 1) ^ (-(instance & 1));

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March 27, 2022 Flutter

Which dart2js command is launched by DartEditor?

Issue After reading article found at https://www.dartlang.org/articles/web-ui/tools.html, I tried to compile my application by following it. My application stored in web/app.html can be successfully compiled to Javascript under DartEditor by using “Run as Javascript” command. When I try to use

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March 27, 2022 Flutter

Is there any tool like gruntjs can convert dart to js when project file changes?

Issue I’m looking for a tool like “gruntjs” which can monitor my dart project, and when file changes, it’s able to: convert dart files to javascript files restart my custom dart command: dart app.dart I don’t find any plugin for

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March 27, 2022 Flutter

Compile dart in the browser

Issue In my application I generate big dart classes. Right now I compile them on the server, which takes CPU time. It would be much better to compile the Dart code within the browser. The code is then loaded via

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March 27, 2022 Flutter

$ in '–global-js-name==', JQuery compatibility and Sublime Text – Build Systems

Issue By default JS script generated by dart2js has global name $ same as JQuery so it can be problematic to use both simultaneously. To solve this problem dart2js has parameter –global-js-name=={GLOBAL NAME} but {GLOBAL NAME} must match \$[a-z]* (example:

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March 27, 2022 Flutter

'Mi' is not a subtype of type 'IF' with dart2js

Issue I’m facing an issue with dart2js since today, dart2js go to the end without any error, but when i launch my webapp on a browser (Chrome) the console send this error “Uncaught type ‘Mi’ is not a subtype of

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March 27, 2022 Flutter

Adding children to SelectElement in Dart

Issue I am creating a (very large) select element that needs to be added in several places on a single page. Instead of recreating it for every instance I am making a single prototype and then doing a deep clone

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March 27, 2022 Flutter

How to use javascript polyfills with dart2js

Issue I want to use indexedDB polyfill with Dart code compiled to Javascript. When i just added required script, dart2js code does not recognize window.indexedDB property as IDBFactory instance and produce UnknownJavaScriptObject interceptor. I tried to force constructor.name on elements

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March 27, 2022 Flutter

"Run as JavaScript" does not work with my dart web app?

Issue I cannot find the reason why my app does not work when compiled to JavaScript using dart2js. I have tried debugging my compiled JavaScript app using Google DevTools but found it very difficult to understand both the debugger and

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