mirror of
https://github.com/flutter/flutter.git
synced 2026-02-20 02:29:02 +08:00
9cc9f396b5
Adds a Dart API so Application/Plugin programmers can retrieve the `initialData` configuration value that may be passed when adding a view from JS in a multiViewEnabled app.
When adding a view to an app like this:
```js
flutterApp.addView({
hostElement: someElement,
initialData: {
randomUUID: globalThis.crypto.randomUUID(),
}
});
```
`initialData` can be accessed from Dart by defining a JS-interop class like:
```dart
import 'dart:js_interop';
// The JS-interop definition of the `initialData` object passed to the views of this app.
@JS()
@staticInterop
class InitialData {}
/// The attributes of the [InitialData] object.
extension InitialDataExtension on InitialData {
external String? get randomUUID;
}
```
And then, from the code of the application:
```dart
...
Widget build(BuildContext context) {
final int viewId = View.of(context).viewId;
final InitialData? data = ui_web.views.getInitialData(viewId) as InitialData?;
return Text('${data?.randomUUID}');
}
...
```
## Testing
Will add unit tests once naming is sorted out :)
[C++, Objective-C, Java style guides]: https://github.com/flutter/engine/blob/main/CONTRIBUTING.md#style