[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");