Created
June 19, 2014 06:17
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TypeScript demo
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| declare var log: { | |
| (value): void; | |
| }; | |
| interface Food { | |
| name: string; | |
| ingredients?: string[]; | |
| } | |
| enum AnimalType { | |
| Unknown = 0, | |
| Dog = 1, | |
| Cat = 2, | |
| } | |
| class Animal { | |
| public name: string; | |
| constructor(name: string) { | |
| this.name = name; | |
| } | |
| eat(food: Food); | |
| eat(food: string); | |
| eat(food: any) { | |
| var foodName = (typeof food == 'string') ? food : food.name; | |
| log([this.name, 'eats', foodName || 'NOTHING'].join(' ')); | |
| } | |
| speak() { | |
| log([this.name, "doesn't know how to speak!"].join(' ')); | |
| } | |
| static create(type: AnimalType.Dog, name: string): Dog; | |
| static create(type: AnimalType, name: string): any { | |
| if (type == AnimalType.Dog) { | |
| return new Dog(name); | |
| } | |
| else { | |
| return new Animal(name); | |
| } | |
| } | |
| } | |
| class Dog extends Animal { | |
| constructor(name: string) { | |
| super(name); | |
| } | |
| speak() { | |
| log([this.name, 'says "WOOF!"'].join(' ')); | |
| } | |
| fetch<T>(thing: () => T): T { | |
| var fetched = thing(); | |
| log([this.name, 'fetched', fetched].join(' ')); | |
| return fetched; | |
| } | |
| say(value: string) { | |
| log([this.name, 'says', value].join(' ')); | |
| } | |
| } | |
| class Util { | |
| FindElement(id: string, tag: 'div'): HTMLDivElement; | |
| FindElement(id: string, tag: 'span'): HTMLSpanElement; | |
| FindElement(id: string, tag: string): HTMLElement; | |
| FindElement(id: string, tag: any): HTMLElement { | |
| return document.getElementById(id); | |
| } | |
| } | |
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="utf-8" /> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0" /> | |
| <meta name="description" content="Demo of the TypeScript language" /> | |
| <title>TypeScript HTML App</title> | |
| <style> | |
| body { | |
| font-size: x-large; | |
| } | |
| </style> | |
| <script src="util.js"></script> | |
| <script src="Animal.js"></script> | |
| <script src="app.js"></script> | |
| </head> | |
| <body> | |
| </body> | |
| </html> |
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| function log(value) { | |
| document.writeln([new Date().toLocaleTimeString(),': ', value, '<br>'].join('')); | |
| } |
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