js super constructor
Classes provide "super" keyword for that. super.method(...) to call a parent method. super(...) to call a parent constructor (inside our constructor only). ,class ColorPoint extends Point constructor(x, y, color) super(x, y); // 调用父类 ..... 的 super ，无法看出是作为函数使用，还是作为对象使用，所以JavaScript 引擎 ... , If you are familiar with prototypical inheritance in JavaScript, don't worry, that ... class Widget extends Resource constructor() super(); } }., When used in a constructor, the super keyword appears alone and must be used before the this keyword is used. The super keyword can also ..., Where is the constructor? How is it even possible to use inheritance in old JavaScript code without extends and super keywords? Doesn't this ..., constructor（建構子）是個隨著class 一同建立並初始化物件的特殊方法。 ... 在這裡呼叫了class 的建構子提供多邊形的長寬值 super(length, length); ..., 注：在 constructor 中必须调用 super 方法，因为子类没有自己的 this ... ES6 的class 毕竟是一个“语法糖”，所以只要理解了JavaScript 中对象的概念 ...
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 js super constructor 相關參考資料
Class inheritance - The Modern Javascript Tutorial
Classes provide "super" keyword for that. super.method(...) to call a parent method. super(...) to call a parent constructor (inside our constructor only). https://javascript.info Class 的继承- ECMAScript 6入门
class ColorPoint extends Point constructor(x, y, color) super(x, y); // 调用父类 ..... 的 super ，无法看出是作为函数使用，还是作为对象使用，所以JavaScript 引擎 ... http://es6.ruanyifeng.com Jordan Kasper - Understanding `super` in JavaScript
If you are familiar with prototypical inheritance in JavaScript, don't worry, that ... class Widget extends Resource constructor() super(); } }. https://jordankasper.com super - JavaScript | MDN - Mozilla
When used in a constructor, the super keyword appears alone and must be used before the this keyword is used. The super keyword can also ... https://developer.mozilla.org “Super” and “Extends” In JavaScript ES6 - Understanding The Tough ...
Where is the constructor? How is it even possible to use inheritance in old JavaScript code without extends and super keywords? Doesn't this ... https://medium.com 建構子- JavaScript | MDN
constructor（建構子）是個隨著class 一同建立並初始化物件的特殊方法。 ... 在這裡呼叫了class 的建構子提供多邊形的長寬值 super(length, length); ... https://developer.mozilla.org 理解es6 class 中constructor 方法和super 的作用- 掘金
注：在 constructor 中必须调用 super 方法，因为子类没有自己的 this ... ES6 的class 毕竟是一个“语法糖”，所以只要理解了JavaScript 中对象的概念 ... https://juejin.im |