5.Encode and Decode

function solve() {
    let encodeBtn = document.getElementById('encode').querySelector('button');
    let decodeBtn = document.getElementById('decode').querySelector('button');

    encodeBtn.addEventListener('click', function (e) {
        encodeMsg();
        e.preventDefault();
    })

    decodeBtn.addEventListener('click', function (e) {
        decodeMsg();
        e.preventDefault();
    })

    function encodeMsg () {
        let message = document.getElementById('encode').querySelector('textarea').value;
        let ouputField = document.getElementById('decode').querySelector('textarea')
        let encodedMsg = ''
        for (let char of message) {
            let newCode = char.charCodeAt(0) + 1;
            encodedMsg += String.fromCharCode(newCode);
        }

        ouputField.value = encodedMsg;
        document.getElementById('encode').querySelector('textarea').value = '';
    }

    function decodeMsg () {
        let receivedMsg = document.getElementById('decode').querySelector('textarea').value;
        let decodedMsg = '';
        for (let char of receivedMsg) {
            let newCode = char.charCodeAt(0) - 1;
            decodedMsg += String.fromCharCode(newCode);
        }

        document.getElementById('decode').querySelector('textarea').value = decodedMsg;
    }

}