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I iterate over the array and create an element. An item is added to the page, but its content is not visible. And in the console, the content is written
But on the page itself is not visible. Tell me why?
var notes = []; var tcor = 0; var lcor = 0; var indicator = 0; var addfirstlevel = document.getElementById('addfirstlevel').onclick = addfirstlevel; function addfirstlevel(){ var dialog = document.getElementById('dialog'); dialog.showModal(); var date = document.getElementById('date'); var time = document.getElementById('time'); var dateObj = new Date(); date.value = dateObj.toISOString().slice(0,10) time.value = dateObj.getHours() + ':' + dateObj.getMinutes(); } var add = document.getElementById('add').onclick = add; function add (){ var header = document.getElementById('header'); var notetext = document.getElementById('note-text'); var date = document.getElementById('date'); var time = document.getElementById('time'); function far () { console.log("aga"); } function addmain(){ notes.map(item, index, ) } if (header.value === "" || notetext.value === "") { var message = document.getElementById('fail'); message.style.display = "block"; }else { tcor+=10; lcor+=10; indicator+=1; var obg = { id: indicator, header: header.value, date: date.value, time: time.value, notetext: notetext.value, left: lcor, top: tcor }; notes.push(obg); notes.forEach(function(item){ var main = document.getElementById("main"); var one = document.createElement("div"); var two = document.createElement("p"); var tree = document.createElement("p"); var four = document.createElement("p"); var five = document.createElement("p"); one.className = "note"; one.style.left = item.left + "px"; one.style.top = item.top + "px"; two.className = "item-of-note"; tree.className = "item-of-note"; four.className = "item-of-note"; five.className = "item-of-note"; two.textContent = "item.header"; tree.textContent = item.date; four.textContent = item.time; five.textContent = item.notetext; one.appendChild(two); one.appendChild(tree); one.appendChild(four); one.appendChild(five); one.onclick = far; main.appendChild(one); }) dialog.close(); } } #main { width: 100%; height: 900px; background-color: #ecbb32; position: relative; } #addfirstlevel { width:40px; height:40px; float:right; margin: 20px 20px 20px 20px; background: green; border-radius: 2px; } .plus { background: white; height: 20px; width: 6px; position: relative; left: 17px; top: 10px; } .plus:after { content: ""; height: 6px; width: 20px; background: white; position: absolute; left: -7px; top: 7px; } .form { display: flex; flex-direction: column; } .note { width:300px; height:300px; position: absolute; background: #fdfb35; } .item-of-note { margin-top: 5px; font-family: 'Indie Flower', cursive; font-size: 10px; } input { margin-bottom: 30px; } button { margin-top: 30px; border-radius: 10px; background: green; font-family: 'Indie Flower', cursive; } dialog::backdrop { position: fixed; top: 0; left: 0; right: 0; bottom: 0; background-color: rgba(0, 0, 0, 0.8); } p { display: none; font-size: 30px; font-family: 'Indie Flower', cursive; color: red; } <div id="main"> <div id="addfirstlevel"> <div class="plus"></div> </div> <dialog id="dialog"> <div class="form"> <input id="header" maxlength="20" placeholder="Заголовок" type="text"> <input id="date" type="date"> <input id="time" type="time"> <textarea id="note-text" placeholder="Текст заметки" maxlength="44"></textarea> <button id="add">Добавить</button> </div> <p>Заметка размещена</p> <p id="fail">Проверьте<br>данные</p> </dialog> </div> 

mainand there is no variablenotes. Add a minimal, self-sufficient and reproducible example so that we can run it in our home and see your problem, otherwise you will not be helped here. - andreymalp { display: noneis written in your CSS in plain text - that is, hide all<p>elements. Therefore, it is not visible - andreymal