JavaScript Project - Notes App

In this tutorial, we will learn how to create a simple Notes App in JavaScript.

JavaScript Notes Application

Create a folder called notes-app as project workspace and we will create all the project files inside this folder.

1. index.html

Let's create index.html and add the following code to it:

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8" />
        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
        <title>Notes App</title>
        <link rel="stylesheet" href="style.css" />
        <link
            rel="stylesheet"
            href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.14.0/css/all.min.css"
        />
        <script src="https://cdnjs.cloudflare.com/ajax/libs/marked/1.1.1/marked.min.js"></script>
        <script src="script.js" defer></script>
    </head>
    <body>
        <button class="add" id="add">
            <i class="fas fa-plus"></i> Add note
        </button>
    </body>
</html>

2. script.js

Let's create JavaScript file named script.js and add following JavaScript code to it:

const addBtn = document.getElementById("add");

const notes = JSON.parse(localStorage.getItem("notes"));

if (notes) {
    notes.forEach((note) => {
        addNewNote(note);
    });
}

addBtn.addEventListener("click", () => {
    addNewNote();
});

function addNewNote(text = "") {
    const note = document.createElement("div");
    note.classList.add("note");

    note.innerHTML = `
        <div class="notes">
            <div class="tools">
                <button class="edit"><i class="fas fa-edit"></i></button>
                <button class="delete"><i class="fas fa-trash-alt"></i></button>
            </div>
            <div class="main ${text ? "" : "hidden"}"></div>
            <textarea class="${text ? "hidden" : ""}"></textarea>
        </div>
    `;

    const editBtn = note.querySelector(".edit");
    const deleteBtn = note.querySelector(".delete");

    const main = note.querySelector(".main");
    const textArea = note.querySelector("textarea");

    textArea.value = text;
    main.innerHTML = marked(text);

    editBtn.addEventListener("click", () => {
        main.classList.toggle("hidden");
        textArea.classList.toggle("hidden");
    });

    deleteBtn.addEventListener("click", () => {
        note.remove();

        updateLS();
    });

    textArea.addEventListener("input", (e) => {
        const { value } = e.target;

        main.innerHTML = marked(value);

        updateLS();
    });

    document.body.appendChild(note);
}

function updateLS() {
    const notesText = document.querySelectorAll("textarea");

    const notes = [];

    notesText.forEach((note) => {
        notes.push(note.value);
    });

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

style.css

Let's create CSS file named style.css and add the following CSS code to it:

@import url("https://fonts.googleapis.com/css2?family=Poppins:wght@200;400;600&display=swap");

* {
    box-sizing: border-box;
}

body {
    background-color: #7bdaf3;
    display: flex;
    flex-wrap: wrap;
    font-family: "Poppins", sans-serif;
    margin: 0;
    padding-top: 3rem;
}

.add {
    background-color: #9ec862;
    border-radius: 3px;
    border: none;
    color: white;
    cursor: pointer;
    padding: 0.5rem 1rem;
    position: fixed;
    top: 1rem;
    right: 1rem;
}

.note {
    background-color: #fff;
    box-shadow: 0 0 10px 4px rgba(0, 0, 0, 0.1);
    margin: 20px;
    height: 400px;
    width: 400px;
}

.note .tools {
    background-color: #9ec862;
    display: flex;
    justify-content: flex-end;
    padding: 0.5rem;
}

.note .tools button {
    background-color: transparent;
    border: none;
    color: #fff;
    cursor: pointer;
    font-size: 1rem;
    margin-left: 0.5rem;
}

.note .main {
    background-color: #eee;
    overflow: hidden;
    height: 400px;
    width: 100%;
}

.note textarea {
    outline: none;
    font-family: inherit;
    font-size: 1.2rem;
    border: none;
    height: 400px;
    width: 100%;
}

.note .hidden {
    display: none;
}

Open index.html in Browser

Let's open the index.html file in the browser and you will be able to see the following screen:

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