dart-js-interop

问题 It does not appear there is a clear interception of JS Promises by the Interop or dart2JS. ServiceWorkerContainer swContain = window.navigator.serworker; swContain.register(workerScriptURI,scope).then((ServiceWorkerRegistration rego){ /// Here confirm scope and the state, handle and unregister if required. )}; Yet it appears to be no way of pulling this off without wrapping the promise and a completer. When I then I can not get to work in a dependable fashion. Long post here: https://groups

来源： https://stackoverflow.com/questions/60276170/use-js-library-in-flutter-web

来源： https://stackoverflow.com/questions/60276170/use-js-library-in-flutter-web

问题 I have a Flutter Web project. I have the following HTML script that I need to put into HtmlElementView: <script src="https://www.paypal.com/sdk/js?client-id=YOUR_CLIENT_ID"></script> <script>paypal.Buttons().render('body');</script> from here. I have tried this: Widget build(BuildContext context) { // ignore: undefined_prefixed_name ui.platformViewRegistry.registerViewFactory( 'paypal-button', (int viewId) => IFrameElement() ..width = '500' ..height = '500' ..src = ''' <div id="paypal-button

问题 I have this code here, which I am converting to Dart. The problem is with the callbacks. function stop(e) { var node = e.target.getContainer(); node[SMap.LAYER_MARKER].style.cursor = ""; var coords = e.target.getCoords(); alert("Cílová pozice: " + coords.toWGS84(2).reverse().join(" ")); } var signals = mapa.getSignals(); signals.addListener(window, "marker-drag-stop", stop); My code in Dart var signals = mapa.callMethod('getSignals', []); signals.callMethod('addListener', [context, 'marker

问题 I have this code here, which I am converting to Dart. The problem is with the callbacks. function stop(e) { var node = e.target.getContainer(); node[SMap.LAYER_MARKER].style.cursor = ""; var coords = e.target.getCoords(); alert("Cílová pozice: " + coords.toWGS84(2).reverse().join(" ")); } var signals = mapa.getSignals(); signals.addListener(window, "marker-drag-stop", stop); My code in Dart var signals = mapa.callMethod('getSignals', []); signals.callMethod('addListener', [context, 'marker

问题 I want to write some Dart function "oKey" which calls JavaScript function "jsOnKey" (with success or exception too since cannot predict). Next I want that JavaScript function "onKey" will call Dart function "callbackFromJs" to return control to Dart again (with success or exception). Can you help me with this full flow - please assume SUCCESS or EXCEPTION on each border - I can not rely on 3rd party code - DART 2 JS 2 DART? To make more context to this general question I put example code.

问题 After announcing new strategy for Dart, i decided to change include from <script type="application/dart" src="/dart/script.dart"></script> to <script type="text/javascript" src="/dart/script.dart.js"></script> But in that case js-interop seems broken. dart:js.context is empty. Is there any workarounds for this? 回答1: It looks like you are missing this script tag: <script data-pub-inline src="packages/browser/dart.js"></script> There is also an open issue to fix this http://dartbug.com/23005 来源

问题 I have a Dart class (foo.dart): class Foo { void talk() { print('Hello'); } } After compiling foo.dart to JavaScript, I'd like to be able to use Foo like this: var foo = new Foo(); // from foo.dart.js foo.talk() // prints "Hello" My questions: Is this currently possible? If so, how? If not, what plans, if any, are in place to make it possible? The dart:js library documentation states: This library does not yet make Dart objects usable from JavaScript, their methods and proeprties [sic] are

问题 I am attempting to use Dart's package:js to create an interop library for JScrollPane, which is wrapped with jQuery. Here's what I have so far: @JS() library jscrollpane; import 'dart:html'; import 'package:js/js.dart'; @JS() @anonymous abstract class JScrollPaneSettings { external factory JScrollPaneSettings({bool showArrows}); external bool get showArrows; external set showArrows(bool value); } @JS() class JScrollPane { external JScrollPane(Element element, JScrollPaneSettings settings); }