@wprimadi/lockdown

LOCKDOWN 🛡️

Log Obfuscation & Console Kill-switch with Devtools Override Warning Network

LOCKDOWN is a lightweight JavaScript library designed to protect your website from unwanted user interactions such as opening DevTools, copying text, right-clicking, and more. This library helps you add an extra layer of front-end security in just a few lines of code.

✨ Features

• 🔒 Detect and block browser DevTools
• 🖱️ Disable right-click (context menu)
• 🧠 Block keyboard shortcuts like F12, Ctrl+Shift+I, Ctrl+U, etc.
• 📋 Prevent text copy and cut
• ❌ Disable text selection
• 🚫 Block mouse down actions
• 🔄 Optional redirect when DevTools is detected

🚀 Getting Started

1. Install

You can include it directly in your HTML file:

<script src="lockdown.js"></script>

Or serve it via NPM/CDN:

CDN

You can include B.A.R.R.I.C.A.D.E from a CDN:

<script src="https://cdn.jsdelivr.net/gh/wprimadi/lockdown@v1.0.0/lockdown.min.js"></script>

Or the latest version:

<script src="https://cdn.jsdelivr.net/gh/wprimadi/lockdown/lockdown.min.js"></script>

NPM

Install via NPM:

npm install @wprimadi/lockdown

Or use it from the CDN NPM package:

<script src="https://cdn.jsdelivr.net/npm/@wprimadi/lockdown/lockdown.min.js"></script>

For more details, visit the NPM page.

2. Initialize

window.addEventListener('DOMContentLoaded', () => {
    lockdown.init({
        redirectUrl: '/access_denied',       // URL to redirect when DevTools is opened
        disableContextMenu: true,            // Default: true
        disableShorcuts: true,               // Default: true
        disableTextCopy: true,               // Default: true
        disableTextCut: true,                // Default: true
        disableTextSelection: true,          // Default: true
        disableMouseDown: true,              // Default: true
        disableDevTools: true                // Default: true
    });
});

All options are optional. If omitted, they will use the default values.

⚙️ Configuration Options

Option	Type	Default	Description
redirectUrl	string	empty string	URL to redirect when DevTools is detected. Leave empty to skip redirect.
disableContextMenu	bool	true	Disable right-click menu.
disableShorcuts	bool	true	Block developer tool-related keyboard shortcuts.
disableTextCopy	bool	true	Prevent users from copying text.
disableTextCut	bool	true	Prevent users from cutting text.
disableTextSelection	bool	true	Disable text selection on the page.
disableMouseDown	bool	true	Disable mouse down interaction.
disableDevTools	bool	true	Enable/disable DevTools detection mechanism.

🔐 Use Case

LOCKDOWN is perfect for:

• Web-based quizzes or assessments
• SaaS dashboards with sensitive UI elements
• Public landing pages where copying or debugging is discouraged
• Frontend-only applications requiring extra client-side security

🌐 Compatibility

LOCKDOWN has been tested and verified on the following browsers:

⚠️ Disclaimer

This library only provides basic obfuscation and deterrence. It is not a foolproof security solution and should be used alongside proper backend validation and security best practices.

📄 License

MIT License © 2025 Wahyu Primadi