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js/hacktoberfest2025/Modules Expand file tree Collapse file tree Original file line number Diff line number Diff line change 1+ <!DOCTYPE html>
2+ < html lang ="en ">
3+ < head >
4+ < meta charset ="UTF-8 " />
5+ < meta name ="viewport " content ="width=device-width, initial-scale=1.0 "/>
6+ < title > JS Modules </ title >
7+ < script type ="module " src ="main.js "> </ script >
8+ < style >
9+ body { font-family : Arial;
10+ padding : 20px ;
11+ background : # f4f4f4 ;
12+ }
13+ .box { max-width : 500px ;
14+ margin : auto;
15+ background : white;
16+ padding : 20px ;
17+ border-radius : 10px ;
18+ }
19+ pre { background : # eee ;
20+ padding : 10px ;
21+ border-radius : 5px ;
22+ }
23+ </ style >
24+ </ head >
25+ < body >
26+ < div class ="box ">
27+ < h2 > JS Modules – import/export</ h2 >
28+ < p > Open console to see output!</ p >
29+ < pre id ="output "> </ pre >
30+ </ div >
31+ </ body >
32+ </ html >
Original file line number Diff line number Diff line change 1+ // Modules/main.js
2+
3+ import multiply , { add , subtract , PI } from './math.js' ;
4+ import sayHello , { admin , Person } from './user.js' ;
5+
6+ // Use math
7+ console . log ( "5 + 3 =" , add ( 5 , 3 ) ) ;
8+ console . log ( "10 - 4 =" , subtract ( 10 , 4 ) ) ;
9+ console . log ( "5 * 3 =" , multiply ( 5 , 3 ) ) ;
10+ console . log ( "PI =" , PI ) ;
11+
12+ // Use user
13+ admin . login ( ) ;
14+ sayHello ( ) ;
15+
16+ const sabin = new Person ( "Sabin Pro" ) ;
17+ sabin . greet ( ) ;
18+
19+ // Show in HTML
20+ document . getElementById ( 'output' ) . textContent = `
21+ add(5,3) = ${ add ( 5 , 3 ) }
22+ multiply(5,3) = ${ multiply ( 5 , 3 ) }
23+ Person: ${ sabin . name }
24+ ` . trim ( ) ;
Original file line number Diff line number Diff line change 1+ // Modules/math.js
2+
3+ export function add ( a , b ) {
4+ return a + b ;
5+ }
6+
7+ export function subtract ( a , b ) {
8+ return a - b ;
9+ }
10+
11+ export const PI = 3.14 ;
12+
13+ export default function multiply ( a , b ) {
14+ return a * b ;
15+ }
Original file line number Diff line number Diff line change 1+ // Modules/user.js
2+
3+
4+ export const admin = {
5+ name : "Sabin" ,
6+ role : "Admin" ,
7+ login ( ) {
8+ console . log ( `${ this . name } logged in!` ) ;
9+ }
10+ } ;
11+
12+ export class Person {
13+ constructor ( name ) {
14+ this . name = name ;
15+ }
16+ greet ( ) {
17+ console . log ( `Hi, I'm ${ this . name } ` ) ;
18+ }
19+ }
20+
21+ // Default export
22+ export default function sayHello ( ) {
23+ console . log ( "Hello from default export!" ) ;
24+ }
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