import 和 export -- ES6

例子:

最后返回的结果是:

{
    default: function fn2(){

    },
    foo2: 1,
    test3: {
        default: function fn3(){

        },
        foo3: 1
    }
}

// app.js
// import json from './1.json';
import * as all from './test2';
import fn2 from './test2';

console.log(all);
console.log(all.default === fn2); // true
console.log(fn2);

// test2.js
function fn2(){
    console.log(1);
}

export default fn2;
var foo2 = 1;
export {foo2};
export * as test3 from './test3';

// test3.js
function fn3(){
    console.log(1);
}

var foo3 = 1;
export {foo3};

export default fn3;