[ES6] Module export

Default export:

Default export is easy way to export a function to outside module.

//flash-message.js
export default function(message){
   alert(message);
}

//app.js
import flashMessage from './flast-message';

flashMessage("Hello");

Default export can only export one function pre module:

//flash-message.js
export default function(message){
   alert(message);
}

// Not available outside this module
function logMessage(message) {
   console.log(message);
}

Using named exprots:

In order to export multiple functions from a single module, we can use naming exprots.

// flash-message.js
function alertMessage(message) {
   alert(message);
}

function logMessage(message) {
   console.log(message);
}

export {alertMessage, logMessage};

//app.js

import {alertMessage, logMessage} from './flash-message';

alertMessage("Hello");
logMessage("Hello");