Duoc Nguyen

<p>Normally, when a user tries to access your website without the internet, they will not be able to obtain any information about you.</p>
<p>What happens if your client is coming to your shop, the internet is lost suddenly. And what happens if they forgot your phone number. You lost them.</p>
<p>Do not let it happen, let’s help them come to you even when there is no internet.</p>
<p>This plugin can help you give your clients the necessary contact information when they lose the internet.</p>
<p>By using the service worker to handle an offline situation. This plugin will save offline messages to the customer’s device when they do not have internet access, and this message will be displayed.</p>
<h4>How to test</h4>
<p>Please view this video: <a href="https://www.youtube.com/watch?v=KqcvvWgcS1I" rel="nofollow ugc">Demo plugin</a></p>
<h4>Notice</h4>
<p>Your website need to have SSL (HTTPS). Otherwise, the service worker will not be able to work.</p>
<h4>Frequently Asked Questions</h4>
<ul>
<li>Why my website still offline? : Make sure you have https.</li>
<li>I have https, why it not work? : You have to close your browser and test again.</li>
</ul>
<h3>Notice</h3>
<p>Your website need to have SSL (HTTPS). Otherwise, the service worker will not be able to work.</p>


WP Offline Fallback

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Help you to show a message to the visitor when they visit your website without the internet. Yes, it's possible.

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<p>Swift PWA is a comprehensive WordPress plugin that transforms your website into a Progressive Web App (PWA) with enterprise-grade security features.</p>
<h4>Key Features</h4>
<ul>
<li><strong>Security First</strong>: Comprehensive security fixes including file upload validation, SQL injection prevention, XSS protection, and CSRF protection</li>
<li><strong>Modern Workbox</strong>: Uses Workbox 7.0.0 with latest security patches and caching strategies</li>
<li><strong>Smart Caching</strong>: Intelligent caching for HTML, CSS, JS, images, and fonts</li>
<li><strong>Cache Management</strong>: Option to clear cache manually for better control</li>
<li><strong>Offline Support</strong>: Full offline functionality with customizable offline pages</li>
<li><strong>App Manifest</strong>: Automatic generation of web app manifest for app-like experience</li>
<li><strong>Service Worker</strong>: Advanced service worker with cache management</li>
<li><strong>Admin Interface</strong>: User-friendly WordPress admin interface</li>
<li><strong>File Upload Security</strong>: Secure file uploads with validation and size limits</li>
<li><strong>Rate Limiting</strong>: Built-in protection against abuse</li>
<li><strong>Access Control</strong>: Admin-only access with proper capability checks</li>
</ul>
<h4>Security Features</h4>
<ul>
<li>File upload validation (PNG, JPG, GIF, WebP only)</li>
<li>2MB file size limits</li>
<li>MIME type validation</li>
<li>SQL injection prevention with prepared statements</li>
<li>XSS protection with proper output escaping</li>
<li>CSRF protection with nonce verification</li>
<li>Rate limiting on form submissions</li>
<li>Admin capability checks</li>
<li>Input sanitization and validation</li>
</ul>
<h4>PWA Features</h4>
<ul>
<li>Web App Manifest generation</li>
<li>Service Worker registration</li>
<li>Offline page support</li>
<li>App icons and splash screens</li>
<li>Theme and background colors</li>
<li>Display modes (standalone, fullscreen, etc.)</li>
<li>Orientation settings</li>
<li>Precache pages selection</li>
<li>Asset precaching</li>
</ul>
<h4>Requirements</h4>
<ul>
<li>WordPress 5.0 or higher</li>
<li>PHP 7.4 or higher</li>
<li>HTTPS (required for PWA functionality)</li>
<li>File upload permissions</li>
<li>Database write permissions</li>
</ul>
<h3>Support</h3>
<p>For support, please visit the <a href="https://wordpress.org/support/plugin/swift-pwa/" rel="ugc">WordPress.org support forums</a> or create an issue on the plugin’s GitHub repository.</p>
<h3>External Services</h3>
<p>This plugin connects to external services to provide Progressive Web App functionality. The following services are used:</p>
<h4>Google Workbox Library</h4>
<p>This plugin uses Google’s Workbox library to provide service worker functionality and caching strategies.</p>
<ul>
<li>
<p><strong>What it’s used for</strong>: Workbox is a JavaScript library that provides service worker functionality, including caching strategies, precaching, and offline support. It’s essential for the PWA features of this plugin.</p>
</li>
<li>
<p><strong>What data is sent and when</strong>: When a user visits your website, their browser automatically requests the Workbox library from Google’s servers (storage.googleapis.com). This request includes:</p>
<ul>
<li>The user’s IP address (standard HTTP request)</li>
<li>User-Agent string (browser information)</li>
<li>Referrer information (your website URL)</li>
<li>Standard HTTP headers</li>
</ul>
<p>This data is sent automatically by the browser when loading the Workbox library, which happens when the service worker is registered on the user’s device.</p>
</li>
<li>
<p><strong>Service provider</strong>: Google LLC</p>
<ul>
<li>Terms of Service: https://policies.google.com/terms</li>
<li>Privacy Policy: https://policies.google.com/privacy</li>
<li>Workbox Documentation: https://developers.google.com/web/tools/workbox</li>
</ul>
</li>
</ul>
<p><strong>Note</strong>: The Workbox library is loaded directly from Google’s servers. No personal data from your WordPress site is transmitted to Google. Only standard HTTP request data (IP address, browser information) is sent, which is standard for any web resource request.</p>
<h4>Google Fonts (Optional)</h4>
<p>If your website uses Google Fonts, the plugin’s service worker may cache these resources. This is an optional feature that only applies if you have Google Fonts on your site.</p>
<ul>
<li>
<p><strong>What it’s used for</strong>: Caching Google Fonts resources (fonts.googleapis.com and fonts.gstatic.com) for offline access and improved performance.</p>
</li>
<li>
<p><strong>What data is sent and when</strong>: If your site uses Google Fonts, standard HTTP requests are made to Google’s servers when fonts are loaded. This includes IP address and browser information, as with any web resource.</p>
</li>
<li>
<p><strong>Service provider</strong>: Google LLC</p>
<ul>
<li>Terms of Service: https://policies.google.com/terms</li>
<li>Privacy Policy: https://policies.google.com/privacy</li>
<li>Google Fonts Privacy: https://developers.google.com/fonts/faq#what_does_using_the_google_fonts_api_mean_for_the_privacy_of_my_users</li>
</ul>
</li>
</ul>
<p><strong>Note</strong>: Google Fonts caching is only enabled if your website already uses Google Fonts. The plugin does not add Google Fonts to your site; it only caches them if they’re already present.</p>
<h3>Privacy Policy</h3>
<p>This plugin does not collect, store, or transmit any personal data from your WordPress installation. All configuration data remains on your WordPress server.</p>
<p>However, when users visit your website, their browsers will automatically connect to Google’s servers to load the Workbox library. This is a standard web resource request and follows Google’s privacy policy. No data from your WordPress database or user accounts is transmitted to external services.</p>
<h3>Credits</h3>
<ul>
<li>Workbox by Google – https://developers.google.com/web/tools/workbox</li>
<li>WordPress PWA community</li>
<li>Security researchers and contributors</li>
</ul>


Swift PWA

Transform your WordPress site into a Progressive Web App with comprehensive security features and modern caching strategies.

WP Offline Fallback vs Swift PWA