構(gòu)造函數(shù)
class Person {
constructor(name, age) {
this.name = name;
this.age = age;
}
sayHello() {
console.log( `hello, ${this.name}, i am ${this.age} years old`);
}
}
//等價(jià)于
function Person(name, age) {
this.name = name;
this.age = age;
}
Person.prototype.sayHello = function () {
console.log( `hello, ${this.name}, i am ${this.age} years old`);
};
var p = new Person('hunger', 2);
靜態(tài)方法
class EventCenter {
static fire() {
return 'fire';
}
static on(){
return 'on'
}
}
//等同于
function EventCenter(){
}
EventCenter.fire = function(){}
EventCenter.on = function(){}
繼承
class Person {
constructor(name, age) {
this.name = name;
this.age = age;
}
sayHello() {
console.log( `hello, ${this.name}, i am ${this.age} years old`);
}
}
class Student extends Person {
constructor(name, age, score) {
super(name, age);
this.score = score;
}
sayScore() {
console.log( `hello, ${this.name}, i am ${this.age} years old, i get ${this.score}`);
}
}
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