ES6 javascript中class类的get与set用法实例分析

class MyClass {
  constructor() {
    // ...
  }
  get prop() {
    return 'getter';
  }
  set prop(value) {
    console.log('setter: ' + value);
  }
}
let inst = new MyClass();
inst.prop = 123;
// setter: 123
inst.prop
// 'getter'

class CustomHTMLElement {
  constructor(element) {
    this.element = element;
  }
  get html() {
    return this.element.innerHTML;
  }
  set html(value) {
    this.element.innerHTML = value;
  }
}
var descriptor = Object.getOwnPropertyDescriptor(
  CustomHTMLElement.prototype, "html");
"get" in descriptor // true
  "set" in descriptor // true