export
export default
import

1-1 模块化

//a.ts
export var a = 10;
export function go(){
    console.log("go")
}

//b.ts
import {a,go} from './a'
go();
console.log(a);

1-2 导出

 var a = 10;
 function go(){
    console.log("go")
}
export default {
    a,
    go
}

export{
    a,
    go
}