class Test {
test(){
console.log(this)
}
}
let test1 = new Test()
let {test} = new Test()
test1.test() //Test
//怎样才能让这里实现啊
test() //undefined
###class Test {
constructor(){
this.test = this.test.bind(this)
}
test(){
console.log(this)
}
}