Page 11 - Dart Language

Hit enter to display Hello, World! in the terminal window.

Http Request

Html

<img id="cats"></img>

Dart

import 'dart:html';

/// Stores the image in [blob] in the [ImageElement] of the given [selector].
void setImage(selector, blob) {
FileReader reader = new FileReader();
reader.onLoad.listen((fe) {
ImageElement image = document.querySelector(selector);
image.src = reader.result;
});
reader.readAsDataUrl(blob);
}

main() async {
var url = "https://upload.wikimedia.org/wikipedia/commons/2/28/Tortoiseshell_she-cat.JPG";

// Initiates a request and asynchronously waits for the result.
var request = await HttpRequest.request(url, responseType: 'blob');
var blob = request.response;
setImage("#cats", blob);
}

Example

see Example on https://dartpad.dartlang.org/a0e092983f63a40b0b716989cac6969a

Getters and Setters

void main() {
var cat = new Cat();

print("Is cat hungry? ${cat.isHungry}"); // Is cat hungry? true
print("Is cat cuddly? ${cat.isCuddly}"); // Is cat cuddly? false
print("Feed cat.");
cat.isHungry = false;
print("Is cat hungry? ${cat.isHungry}"); // Is cat hungry? false
print("Is cat cuddly? ${cat.isCuddly}"); // Is cat cuddly? true
}

class Cat {
bool _isHungry = true;

bool get isCuddly => !_isHungry;

https://riptutorial.com/ 6