TypeScript變量，它包含一個擴展基類的類實例

Question

我想要一個變量來存儲一個類實例數組，但我想指定數據類型作爲從「基」類繼承的任何東西。這更好地通過示例演示：

class Mom { } //Base class 
class Son extends Mom { } 
class Daughter extends Mom { } 

//What is the syntax for this? 
let example : <T extends Mom>T[] = [ ]; //This array should store anyting that extends 'Mom' 

//The this would be possible 
example.push(new Mom()); 
example.push(new Son()); 
example.push(new Daughter()); 

在此先感謝。

Answer 1

嘗試這種方式

let example : Array<Mom> = [ ]; 

見here

Answer 2

你可以做這樣的事情

type Shape = Mom | Son | Daughter; 
let example:Array<Shape> = new Array<Shape>();