export of several uses

Several written record about the export of.

0. entrance file index.js, citations of add-content.js

1. export default mode, directly derived variable

follows the add-content.js

1 function write() {
2   document.write('Hello World')
3 }
4 
5 var app = {}
6 app.write = write
7 
8 export default app;

To write references index.js

1 import app from './add-content'
2 app.write()

2. export {} mode, for deriving a plurality of variables simultaneously

follows the add-content.js

 1 function write() {
 2   document.write('Hello World')
 3 }
 4 
 5 var app = {}
 6 app.write = write
 7 
 8 export {
 9   app
10 }

index.js reference to quotation marks, as follows

1 import { app } from './add-content'
2 app.write();

3. export and variable declaration shorthand

follows the add-content.js

1 function write() {
2   document.write('Hello World')
3 }
4 
5 export var app = {
6   write: write
7 }

index.js reference to quotation marks, as follows

1 import { app } from './add-content'
2 app.write();

Memo ~