[ Node.js ] toLowerCase(), toUpperCase() 사용법

case1.js

var text = 'Hello World Guys';

var printBefore = () => {
    console.log('Before :' + text);
}

var printAfter = () => {
    console.log('After :' + text.toLowerCase());
}

var printUpper = () => {
    console.log('upper : ' + text.toUpperCase());
}

module.exports = {
    printBefore, printAfter, printUpper
}

case2.js

var func = require('./case1.js');

func.printBefore();
func.printAfter();
func.printUpper();