1. UI Not Rendering Properly

Understanding the Issue

UI elements do not appear correctly, styles are missing, or pages do not transition smoothly.

Root Causes

• Missing or incorrect inclusion of LungoJS and CSS files.
• Improper DOM structure affecting rendering.
• Conflicts with other JavaScript libraries.

Fix

Ensure that LungoJS and its styles are correctly loaded:

<link rel="stylesheet" href="/path-to-lungo/lungo.css">
<script src="/path-to-lungo/lungo.js"></script>

Use the correct page structure:

<section id="main" data-transition="fade">
  <article id="home">
    <h1>Welcome to Lungo</h1>
  </article>
</section>

Check for conflicts with other frameworks:

if (typeof Lungo === "undefined") {
  console.error("LungoJS not loaded correctly");
}

2. Event Handlers Not Working

Understanding the Issue

Click, swipe, or tap events do not trigger expected actions.

Root Causes

• Incorrect event binding syntax.
• Event listeners attached before the DOM is fully loaded.
• Conflicts with other JavaScript frameworks intercepting touch events.

Fix

Ensure event handlers are correctly bound using LungoJS API:

Lungo.dom("#myButton").on("tap", function() {
  alert("Button tapped!");
});

Use Lungo.ready() to ensure DOM is fully loaded:

Lungo.ready(function() {
  console.log("LungoJS is ready");
});

Prevent conflicts with other libraries by isolating event handling:

document.addEventListener("DOMContentLoaded", function() {
  Lungo.dom("#myElement").on("swipe", function() {
    console.log("Swipe event triggered");
  });
});

3. AJAX Requests Failing

Understanding the Issue

AJAX calls do not fetch data, return errors, or cause application crashes.

Root Causes

• Incorrect API endpoint or CORS restrictions.
• Improper request format or missing headers.
• Network issues preventing data retrieval.

Fix

Use LungoJS built-in AJAX methods for requests:

Lungo.Service.get("https://api.example.com/data", {}, function(response) {
  console.log(response);
}, "json");

Ensure the server allows cross-origin requests (CORS):

Access-Control-Allow-Origin: *

Check for network issues:

fetch("https://api.example.com/status").then(response => console.log(response.status));

4. Performance Issues

Understanding the Issue

The application runs slowly, animations lag, or transitions are not smooth.

Root Causes

• Heavy DOM updates causing performance drops.
• Excessive event listeners or inefficient code execution.
• Slow animations or excessive CSS styles.

Fix

Optimize DOM updates using LungoJS utilities:

Lungo.dom("#list").append("<li>New Item</li>");

Use GPU acceleration for smoother animations:

body {
  transform: translateZ(0);
}

Minimize unnecessary event listeners:

Lungo.dom(".button").off("click").on("click", function() {
  console.log("Optimized click event");
});

5. Deployment Issues

Understanding the Issue

Application does not work correctly on different mobile devices or platforms.

Root Causes

• Incorrect viewport meta tags.
• Platform-specific issues with touch events.
• Outdated LungoJS versions incompatible with modern browsers.

Fix

Ensure proper viewport settings:

<meta name="viewport" content="width=device-width, initial-scale=1">

Test across different devices and browsers:

window.onload = function() {
  console.log("User Agent: " + navigator.userAgent);
};

Update to the latest LungoJS version:

npm update lungojs

Conclusion

LungoJS is a simple yet powerful mobile framework, but troubleshooting UI rendering, event handling, AJAX failures, performance bottlenecks, and deployment issues is crucial for smooth development. By optimizing configurations, handling events efficiently, and ensuring cross-platform compatibility, developers can build stable and high-performing LungoJS applications.

FAQs

1. Why is my LungoJS UI not rendering correctly?

Ensure styles and scripts are loaded, use the correct page structure, and check for conflicts with other libraries.

2. How do I fix event handling issues in LungoJS?

Use LungoJS event binding, wait for DOM readiness, and avoid conflicts with other libraries.

3. Why are my AJAX requests failing?

Verify API endpoints, check CORS settings, and ensure network connectivity.

4. How can I improve performance in LungoJS applications?

Optimize DOM updates, use GPU-accelerated animations, and minimize event listeners.

5. How do I resolve LungoJS deployment issues?

Use proper viewport meta tags, test on multiple devices, and update to the latest LungoJS version.