Revise paste Rest 04. Messenger

function attachEvents() {
    let authorInp = document.getElementById("author");
    let contentInp = document.getElementById("content");

let sendBtn = document.getElementById("submit");
    let refreshBtn = document.getElementById("refresh");

let chatBox = document.getElementById("messages");
    console.log(chatBox)

sendBtn.addEventListener("click", function () {
        let authorName = authorInp.value;
        let msgText = contentInp.value;
        let msgObj = {
            author: authorName,
            content: msgText
        }
        console.log(msgObj)

fetch('https://rest-messanger.firebaseio.com/messanger.json', {
            method: 'post',
            headers: {
                'Content-type': 'application/json'
            },
            body: JSON.stringify(msgObj),
        })
        contentInp.value="";
    })

refreshBtn.addEventListener("click", function () {
        fetch('https://rest-messanger.firebaseio.com/messanger.json')
            .then(res => res.json())
            .then(data => {
                let arrayResponse = Object.entries(data);
                arrayResponse.forEach(obj => {
                    console.log(obj)
                    let composedMessage = `${obj[1].author}: ${obj[1].content}`
                    chatBox.textContent += `${composedMessage}\n`;
                    authorInp.value="";
                    contentInp.value="";

});
            })
    })

}

attachEvents();