es6
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//let,const Destructuring
let name = 'dog';
const park = 'www';
let dog = {name,park};
console.log("dog:\t",dog);
let cat ={
color:'white',
length:'24'
}
let {color,length} = cat;
console.log("color:\t"+color);
console.log("length:\t",length)
// class, extends, super
class Shape{
//构造函数
constructor(){//this
this.type = 'Shape';
}
}
class Ball extends Shape{
constructor(r=0){
super(); //从父类继承this
this.type = 'Ball';
this.r = r
this.x = 0;
this.y = 0;
}
run(){
// arrow function,template
let interval = setInterval(()=>{
this.x++;
this.y++;
if(this.x>3||this.y>3){
clearInterval(interval);
}else{
console.log(`[Ball]:\t${this.x},${this.y} ${this.r}`);
}
},33)
}
// default
print(a = 0){
console.log("print:\t"+a);
}
//rest
say(...words){
console.log("words:\t"+words);
}
}
let ball = new Ball(5);
console.log("r:\t"+ball.r)
ball.run();
ball.print();
ball.say("No","Zuo","No","Die")
JavaScript
INFO