ES2016 地方|-|&tag=check

arrow-function.js&env=js&abbr=clipboard&label=nihao

(
  (name,msg) => console.log(name,msg)
)("dragon","hello,bird");

(
  name => console.log(name)
)("dragon");

let cat = {
  name:"tom",
  speak(msg,cb){
    cb(msg);
  },
  hear(){
    this.speak("tom",()=>{
      console.log("my name",this.name)
    });
  },
  hear2(){
    let that = this;
    this.speak("tom",function(){
      console.log("my name",that.name)
    });
  }
}

cat.hear();
cat.hear2();