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📝 HTML Notes App Tutorial for Beginners (Full Project)

In this tutorial, you will learn how to build a fully functional Notes App using HTML, CSS, and JavaScript. This app works on all devices and saves notes even after refreshing the page!

✨ Features of This Notes App

  • Add new notes
  • Edit notes
  • Delete notes
  • Dark Mode
  • Search notes
  • Auto-save using LocalStorage
  • No backend needed

📌 Step 1 — HTML Structure

<div class="container">
  <h1>Notes App</h1>

  <button id="toggleDark">🌙 Dark Mode</button>

  <input type="text" id="searchBox" placeholder="Search notes...">

  <textarea id="noteInput" placeholder="Write your note here..."></textarea>
  <button id="addNote">Add Note</button>

  <div id="notesList"></div>
</div>

📌 Step 2 — CSS Styling

<style>
body {
  font-family: Arial;
  background: #f4f4f4;
  padding: 20px;
}

.container {
  max-width: 600px;
  margin: auto;
  background: white;
  padding: 20px;
  border-radius: 10px;
}

textarea {
  width: 100%;
  height: 120px;
  margin-top: 10px;
  padding: 10px;
}

.note {
  background: #fff8cc;
  padding: 10px;
  border-radius: 10px;
  margin-top: 10px;
}

.note button {
  margin-right: 5px;
}

.dark {
  background: #222 !important;
  color: white !important;
}
.dark textarea,
.dark input {
  background: #444;
  color: #fff;
}
.dark .note {
  background: #333;
  color: #fff;
}
</style>

📌 Step 3 — JavaScript (Add, Edit, Delete, Search, Dark Mode)

<script>
let notes = JSON.parse(localStorage.getItem("notes") || "[]");

function saveNotes() {
  localStorage.setItem("notes", JSON.stringify(notes));
}

function displayNotes() {
  const list = document.getElementById("notesList");
  list.innerHTML = "";

  let search = document.getElementById("searchBox").value.toLowerCase();

  notes.forEach((note, index) => {
    if (note.toLowerCase().includes(search)) {
      list.innerHTML += `
        <div class='note'>
          <p>${note}</p>
          <button onclick="editNote(${index})">Edit</button>
          <button onclick="deleteNote(${index})">Delete</button>
        </div>
      `;
    }
  });
}

function addNote() {
  let noteText = document.getElementById("noteInput").value.trim();
  if (noteText === "") return alert("Write something first!");

  notes.push(noteText);
  saveNotes();
  displayNotes();
  document.getElementById("noteInput").value = "";
}

function deleteNote(i) {
  notes.splice(i, 1);
  saveNotes();
  displayNotes();
}

function editNote(i) {
  let newNote = prompt("Edit your note:", notes[i]);
  if (newNote !== null) {
    notes[i] = newNote;
    saveNotes();
    displayNotes();
  }
}

document.getElementById("addNote").onclick = addNote;

document.getElementById("searchBox").oninput = displayNotes;

document.getElementById("toggleDark").onclick = () => {
  document.body.classList.toggle("dark");
};

displayNotes();
</script>

🎉 FULL NOTES APP (All Code Together)

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Notes App</title>

<style>
body {
  font-family: Arial;
  background: #f4f4f4;
  padding: 20px;
}

.container {
  max-width: 600px;
  margin: auto;
  background: white;
  padding: 20px;
  border-radius: 10px;
}

textarea {
  width: 100%;
  height: 120px;
  margin-top: 10px;
  padding: 10px;
}

.note {
  background: #fff8cc;
  padding: 10px;
  border-radius: 10px;
  margin-top: 10px;
}

.note button {
  margin-right: 5px;
}

.dark {
  background: #222 !important;
  color: white !important;
}
.dark textarea,
.dark input {
  background: #444;
  color: #fff;
}
.dark .note {
  background: #333;
  color: #fff;
}
</style>
</head>

<body>
<div class="container">
  <h1>Notes App</h1>

  <button id="toggleDark">🌙 Dark Mode</button>

  <input type="text" id="searchBox" placeholder="Search notes...">

  <textarea id="noteInput" placeholder="Write your note here..."></textarea>
  <button id="addNote">Add Note</button>

  <div id="notesList"></div>
</div>

<script>
let notes = JSON.parse(localStorage.getItem("notes") || "[]");

function saveNotes() {
  localStorage.setItem("notes", JSON.stringify(notes));
}

function displayNotes() {
  const list = document.getElementById("notesList");
  list.innerHTML = "";

  let search = document.getElementById("searchBox").value.toLowerCase();

  notes.forEach((note, index) => {
    if (note.toLowerCase().includes(search)) {
      list.innerHTML += `
        <div class='note'>
          <p>${note}</p>
          <button onclick="editNote(${index})">Edit</button>
          <button onclick="deleteNote(${index})">Delete</button>
        </div>
      `;
    }
  });
}

function addNote() {
  let noteText = document.getElementById("noteInput").value.trim();
  if (noteText === "") return alert("Write something!");

  notes.push(noteText);
  saveNotes();
  displayNotes();
  document.getElementById("noteInput").value = "";
}

function deleteNote(i) {
  notes.splice(i, 1);
  saveNotes();
  displayNotes();
}

function editNote(i) {
  let newNote = prompt("Edit your note:", notes[i]);
  if (newNote !== null) {
    notes[i] = newNote;
    saveNotes();
    displayNotes();
  }
}

document.getElementById("addNote").onclick = addNote;
document.getElementById("searchBox").oninput = displayNotes;

document.getElementById("toggleDark").onclick = () => {
  document.body.classList.toggle("dark");
};

displayNotes();
</script>
</body>
</html>

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