function fn(){
    console.log('fn');
}

let student = {
username:"admin"
}

console.log('username',student.username);

// module.exports = {student,fn}   同時匯出兩個函式

exports.fn = fn;   //單獨匯出一個函式

let file1 = require('./index.js') //匯入檔案
console.log("f"
 
,file1); 

file1.fn() //執行函式

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