Learn Backendless - 10 Code Examples & CST Typing Practice Test

Backendless is a no-code and low-code backend platform that provides ready-to-use server-side infrastructure for mobile, web, and desktop applications, including database management, APIs, authentication, messaging, and hosting.

View all 10 Backendless code examples →

Backendless Simple Todo App Backendless User Authentication App Backendless Contact Form Saver Backendless Realtime Chat App Backendless Blog Post App Backendless Task Progress Tracker Backendless Feedback Collector Backendless Newsletter Signup Backendless Image Gallery App Backendless Event RSVP App

Learn BACKENDLESS with Real Code Examples

Updated Nov 23, 2025

Introduction & Fundamentals Setup & Configuration Architecture & Deep Internals Performance & Security Development Workflow Learning & Career Growth Business & Strategy Examples

Code Sample Descriptions

Backendless Simple Todo App

// Initialize Backendless
Backendless.initApp("YOUR-APP-ID", "YOUR-API-KEY");

const TodoTable = Backendless.Data.of("Todo");

async function addTodo() {
    const taskInput = document.getElementById("taskInput");
    const newTodo = { task: taskInput.value, done: false };
    await TodoTable.save(newTodo);
    fetchTodos();
}

async function fetchTodos() {
    const todos = await TodoTable.find();
    const list = document.getElementById("todoList");
    list.innerHTML = "";
    todos.forEach(todo => {
        const li = document.createElement("li");
        li.textContent = todo.task;
        list.appendChild(li);
    });
}

document.addEventListener("DOMContentLoaded", fetchTodos);

Demonstrates a simple Backendless app for managing a Todo list, with database storage, adding tasks, and displaying them in a web or mobile app using visual backend tools.

Let’s Try →

Backendless User Authentication App

// Initialize Backendless
Backendless.initApp("YOUR-APP-ID", "YOUR-API-KEY");

async function registerUser(email, password) {
    const user = new Backendless.User();
    user.email = email;
    user.password = password;
    await Backendless.UserService.register(user);
}

async function loginUser(email, password) {
    await Backendless.UserService.login(email, password, true);
    alert('Login successful');
}

Shows how to register and log in users using Backendless' built-in user management system.

Let’s Try →

Backendless Contact Form Saver

// Initialize Backendless
Backendless.initApp("YOUR-APP-ID", "YOUR-API-KEY");

const ContactTable = Backendless.Data.of("Contacts");

async function submitContact() {
    const name = document.getElementById("name").value;
    const email = document.getElementById("email").value;
    const message = document.getElementById("message").value;
    await ContactTable.save({ name, email, message });
    alert('Message saved successfully!');
}

Stores contact form submissions (name, email, message) in a Backendless database table using visual data APIs.

Let’s Try →

Backendless Realtime Chat App

// Initialize Backendless
Backendless.initApp("YOUR-APP-ID", "YOUR-API-KEY");

const channel = Backendless.Messaging.subscribe("chat-channel");

channel.addMessageListener((msg) => {
    const chatBox = document.getElementById("chatBox");
    const div = document.createElement("div");
    div.textContent = msg;
    chatBox.appendChild(div);
});

async function sendMessage() {
    const input = document.getElementById("chatInput");
    await Backendless.Messaging.publish("chat-channel", input.value);
    input.value = "";
}

Demonstrates a realtime chat using Backendless Pub/Sub messaging where users can send and receive messages instantly.

Let’s Try →

Backendless Blog Post App

// Initialize Backendless
Backendless.initApp("YOUR-APP-ID", "YOUR-API-KEY");

const PostTable = Backendless.Data.of("Posts");

async function addPost() {
    const title = document.getElementById("title").value;
    const content = document.getElementById("content").value;
    await PostTable.save({ title, content });
    loadPosts();
}

async function loadPosts() {
    const posts = await PostTable.find();
    const container = document.getElementById("postList");
    container.innerHTML = "";
    posts.forEach(p => {
        const div = document.createElement("div");
        div.innerHTML = `<h3>${p.title}</h3><p>${p.content}</p>`;
        container.appendChild(div);
    });
}

document.addEventListener("DOMContentLoaded", loadPosts);

Stores blog posts with title, author, and content using Backendless Data, and displays them dynamically.

Let’s Try →

Backendless Task Progress Tracker

// Initialize Backendless
Backendless.initApp("YOUR-APP-ID", "YOUR-API-KEY");

const TaskTable = Backendless.Data.of("Tasks");

async function addTask() {
    const name = document.getElementById("taskName").value;
    await TaskTable.save({ name, progress: 0 });
    loadTasks();
}

async function updateProgress(id, value) {
    const task = await TaskTable.findById(id);
    task.progress = value;
    await TaskTable.save(task);
    loadTasks();
}

async function loadTasks() {
    const tasks = await TaskTable.find();
    const list = document.getElementById("taskList");
    list.innerHTML = "";
    tasks.forEach(t => {
        const li = document.createElement("li");
        li.textContent = `${t.name} - ${t.progress}%`;
        list.appendChild(li);
    });
}

document.addEventListener("DOMContentLoaded", loadTasks);

Tracks tasks with progress percentage, using Backendless to store and update their status.

Let’s Try →

Backendless Feedback Collector

// Initialize Backendless
Backendless.initApp("YOUR-APP-ID", "YOUR-API-KEY");

const FeedbackTable = Backendless.Data.of("Feedback");

async function submitFeedback() {
    const rating = document.getElementById("rating").value;
    const comment = document.getElementById("comment").value;
    await FeedbackTable.save({ rating, comment });
    alert('Feedback sent!');
}

Collects user feedback with rating and comments, storing data in Backendless.

Let’s Try →

Backendless Newsletter Signup

// Initialize Backendless
Backendless.initApp("YOUR-APP-ID", "YOUR-API-KEY");

const Newsletter = Backendless.Data.of("Subscribers");

async function subscribe() {
    const email = document.getElementById("email").value;
    if (!email.includes('@')) {
        alert('Invalid email');
        return;
    }
    await Newsletter.save({ email });
    alert('Subscribed successfully!');
}

Saves user email addresses for newsletters into a Backendless table with unique validation.

Let’s Try →

Backendless Image Gallery App

// Initialize Backendless
Backendless.initApp("YOUR-APP-ID", "YOUR-API-KEY");

async function uploadImage(file) {
    await Backendless.Files.upload(file, 'images/');
    loadGallery();
}

async function loadGallery() {
    const files = await Backendless.Files.listing('images/');
    const gallery = document.getElementById("gallery");
    gallery.innerHTML = "";
    files.forEach(f => {
        const img = document.createElement("img");
        img.src = f.publicUrl;
        gallery.appendChild(img);
    });
}

Uploads and displays image URLs using Backendless File Service.

Let’s Try →

Backendless Event RSVP App

// Initialize Backendless
Backendless.initApp("YOUR-APP-ID", "YOUR-API-KEY");

const RSVPTable = Backendless.Data.of("RSVP");

async function submitRSVP() {
    const name = document.getElementById("name").value;
    const attending = document.getElementById("attending").checked;
    await RSVPTable.save({ name, attending });
    alert('RSVP recorded!');
}

async function loadRSVPs() {
    const data = await RSVPTable.find();
    const list = document.getElementById("rsvpList");
    list.innerHTML = "";
    data.forEach(p => {
        const li = document.createElement("li");
        li.textContent = `${p.name} - ${p.attending ? 'Yes' : 'No'}`;
        list.appendChild(li);
    });
}

document.addEventListener("DOMContentLoaded", loadRSVPs);

Manages event RSVPs by saving attendee names and attendance status using Backendless.

Let’s Try →

Frequently Asked Questions about Backendless

What is Backendless?

What are the primary use cases for Backendless?

Backend for mobile and web apps. Real-time chat and collaboration apps. User authentication and authorization. Push notifications and messaging. Serverless cloud logic for custom workflows

What are the strengths of Backendless?

No backend coding required. Supports real-time data sync. Scalable and secure infrastructure. Cross-platform compatibility. Integrates with external APIs and services

What are the limitations of Backendless?

Learning curve for advanced serverless logic. Limited frontend tools; backend-focused. Free tier has constraints on requests and storage. Complex relational databases may require careful design. Some customizations require knowledge of cloud code

How can I practice Backendless typing speed?

CodeSpeedTest offers 10+ real Backendless code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.

Learn Other Programming Languages

C React Python C++Rust TypeScript Kotlin PHP Java C#Ruby Mql Cql N1ql Cypher Gremlin Partiql Haskell Elixir Fsharp View all languages →

Code Sample Descriptions

Backendless Simple Todo App

// Initialize Backendless
Backendless.initApp("YOUR-APP-ID", "YOUR-API-KEY");

const TodoTable = Backendless.Data.of("Todo");

async function addTodo() {
    const taskInput = document.getElementById("taskInput");
    const newTodo = { task: taskInput.value, done: false };
    await TodoTable.save(newTodo);
    fetchTodos();
}

async function fetchTodos() {
    const todos = await TodoTable.find();
    const list = document.getElementById("todoList");
    list.innerHTML = "";
    todos.forEach(todo => {
        const li = document.createElement("li");
        li.textContent = todo.task;
        list.appendChild(li);
    });
}

document.addEventListener("DOMContentLoaded", fetchTodos);

Demonstrates a simple Backendless app for managing a Todo list, with database storage, adding tasks, and displaying them in a web or mobile app using visual backend tools.

Let’s Try →

Backendless User Authentication App

// Initialize Backendless
Backendless.initApp("YOUR-APP-ID", "YOUR-API-KEY");

async function registerUser(email, password) {
    const user = new Backendless.User();
    user.email = email;
    user.password = password;
    await Backendless.UserService.register(user);
}

async function loginUser(email, password) {
    await Backendless.UserService.login(email, password, true);
    alert('Login successful');
}

Shows how to register and log in users using Backendless' built-in user management system.

Let’s Try →

Backendless Contact Form Saver

// Initialize Backendless
Backendless.initApp("YOUR-APP-ID", "YOUR-API-KEY");

const ContactTable = Backendless.Data.of("Contacts");

async function submitContact() {
    const name = document.getElementById("name").value;
    const email = document.getElementById("email").value;
    const message = document.getElementById("message").value;
    await ContactTable.save({ name, email, message });
    alert('Message saved successfully!');
}

Stores contact form submissions (name, email, message) in a Backendless database table using visual data APIs.

Let’s Try →

Backendless Realtime Chat App

// Initialize Backendless
Backendless.initApp("YOUR-APP-ID", "YOUR-API-KEY");

const channel = Backendless.Messaging.subscribe("chat-channel");

channel.addMessageListener((msg) => {
    const chatBox = document.getElementById("chatBox");
    const div = document.createElement("div");
    div.textContent = msg;
    chatBox.appendChild(div);
});

async function sendMessage() {
    const input = document.getElementById("chatInput");
    await Backendless.Messaging.publish("chat-channel", input.value);
    input.value = "";
}

Demonstrates a realtime chat using Backendless Pub/Sub messaging where users can send and receive messages instantly.

Let’s Try →

Backendless Blog Post App

// Initialize Backendless
Backendless.initApp("YOUR-APP-ID", "YOUR-API-KEY");

const PostTable = Backendless.Data.of("Posts");

async function addPost() {
    const title = document.getElementById("title").value;
    const content = document.getElementById("content").value;
    await PostTable.save({ title, content });
    loadPosts();
}

async function loadPosts() {
    const posts = await PostTable.find();
    const container = document.getElementById("postList");
    container.innerHTML = "";
    posts.forEach(p => {
        const div = document.createElement("div");
        div.innerHTML = `<h3>${p.title}</h3><p>${p.content}</p>`;
        container.appendChild(div);
    });
}

document.addEventListener("DOMContentLoaded", loadPosts);

Stores blog posts with title, author, and content using Backendless Data, and displays them dynamically.

Let’s Try →

Backendless Task Progress Tracker

// Initialize Backendless
Backendless.initApp("YOUR-APP-ID", "YOUR-API-KEY");

const TaskTable = Backendless.Data.of("Tasks");

async function addTask() {
    const name = document.getElementById("taskName").value;
    await TaskTable.save({ name, progress: 0 });
    loadTasks();
}

async function updateProgress(id, value) {
    const task = await TaskTable.findById(id);
    task.progress = value;
    await TaskTable.save(task);
    loadTasks();
}

async function loadTasks() {
    const tasks = await TaskTable.find();
    const list = document.getElementById("taskList");
    list.innerHTML = "";
    tasks.forEach(t => {
        const li = document.createElement("li");
        li.textContent = `${t.name} - ${t.progress}%`;
        list.appendChild(li);
    });
}

document.addEventListener("DOMContentLoaded", loadTasks);

Tracks tasks with progress percentage, using Backendless to store and update their status.

Let’s Try →

Backendless Feedback Collector

// Initialize Backendless
Backendless.initApp("YOUR-APP-ID", "YOUR-API-KEY");

const FeedbackTable = Backendless.Data.of("Feedback");

async function submitFeedback() {
    const rating = document.getElementById("rating").value;
    const comment = document.getElementById("comment").value;
    await FeedbackTable.save({ rating, comment });
    alert('Feedback sent!');
}

Collects user feedback with rating and comments, storing data in Backendless.

Let’s Try →

Backendless Newsletter Signup

// Initialize Backendless
Backendless.initApp("YOUR-APP-ID", "YOUR-API-KEY");

const Newsletter = Backendless.Data.of("Subscribers");

async function subscribe() {
    const email = document.getElementById("email").value;
    if (!email.includes('@')) {
        alert('Invalid email');
        return;
    }
    await Newsletter.save({ email });
    alert('Subscribed successfully!');
}

Saves user email addresses for newsletters into a Backendless table with unique validation.

Let’s Try →

Backendless Image Gallery App

// Initialize Backendless
Backendless.initApp("YOUR-APP-ID", "YOUR-API-KEY");

async function uploadImage(file) {
    await Backendless.Files.upload(file, 'images/');
    loadGallery();
}

async function loadGallery() {
    const files = await Backendless.Files.listing('images/');
    const gallery = document.getElementById("gallery");
    gallery.innerHTML = "";
    files.forEach(f => {
        const img = document.createElement("img");
        img.src = f.publicUrl;
        gallery.appendChild(img);
    });
}

Uploads and displays image URLs using Backendless File Service.

Let’s Try →

Backendless Event RSVP App

// Initialize Backendless
Backendless.initApp("YOUR-APP-ID", "YOUR-API-KEY");

const RSVPTable = Backendless.Data.of("RSVP");

async function submitRSVP() {
    const name = document.getElementById("name").value;
    const attending = document.getElementById("attending").checked;
    await RSVPTable.save({ name, attending });
    alert('RSVP recorded!');
}

async function loadRSVPs() {
    const data = await RSVPTable.find();
    const list = document.getElementById("rsvpList");
    list.innerHTML = "";
    data.forEach(p => {
        const li = document.createElement("li");
        li.textContent = `${p.name} - ${p.attending ? 'Yes' : 'No'}`;
        list.appendChild(li);
    });
}

document.addEventListener("DOMContentLoaded", loadRSVPs);

Manages event RSVPs by saving attendee names and attendance status using Backendless.

Let’s Try →

Frequently Asked Questions about Backendless

What is Backendless?

What are the primary use cases for Backendless?

Backend for mobile and web apps. Real-time chat and collaboration apps. User authentication and authorization. Push notifications and messaging. Serverless cloud logic for custom workflows

What are the strengths of Backendless?

No backend coding required. Supports real-time data sync. Scalable and secure infrastructure. Cross-platform compatibility. Integrates with external APIs and services

What are the limitations of Backendless?

How can I practice Backendless typing speed?

CodeSpeedTest offers 10+ real Backendless code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.