Fetch response.json() returns native js object instead of Map

mnordine commented 6 years ago

Dart SDK Version 2.1.0-dev.8.0
MacOS Mojave
Chrome 70

I was just testing out fetch with DDC (webdev serve) and noticed response.json() returns a native JS object, when I would think it should return a Dart Map:

final fetch = WorkerGlobalScope.instance.fetch;

final response = await fetch('https://api.github.com/users/mnordine');
final json = await response.json();
print(json.runtimeType);

Output: NativeJavaScriptObject

An obvious workaround is to json.decode(await response.text())

A bigger issue I ran into was this throws a runtime error when doing webdev build, but it doesn't with webdev build --no-release

Update: I've filed another issue for the runtime error here: https://github.com/dart-lang/sdk/issues/34924

kevmoo commented 6 years ago

CC @terrylucas RE his latest updates to these APIs

mnordine commented 5 years ago

Also, response above should be a Stream, since it's a ReadableStream in JS

Analyzer thinks it's dynamic
https://api.dartlang.org/stable/2.2.0/dart-html/Window/fetch.html

dart-lang / sdk

Fetch response.json() returns native js object instead of Map #34923