1.class关键字
ES6引入了新的class关键字编写对象
function Language(name){
this.name = name
this.score = 8.0
}
Language.prototype.popular = function () {
return this.score/10*100 + '%'
}
class Language{
constructor(name){
this.name = name
this.score = 8.0
}
hello() {
return this.score/10*100 + '%'
}
}
新的class关键字,避免了属性和原型方法分散的情况
2)class继承
class Language{
constructor(name){
this.name = name
this.score = 8.0
}
hello() {
return this.score/10*100 + '%'
}
}
class FastLanguage extends Language{
constructor(name, speed){
super(name)
this.speed = speed
}
}
language = new FastLanguage('python',0.01)
console.log(language.speed)
console.log(language.name)
extends:继承
super()调用父类构造函数