A standalone JavaScript module that enables fast AJAX navigation on any website using pushState and XHR.
Pjax is a standalone JavaScript module that enables fast AJAX navigation on websites by using pushState and XHR to update page content without full reloads. It transforms traditional server-side generated or static sites into faster, app-like experiences by selectively replacing DOM elements and preserving resources like CSS and JavaScript. The library automatically handles browser history, supports CSS animations, and gracefully degrades for unsupported browsers.
Frontend developers working on traditional websites (server-side rendered or static) who want to improve navigation performance and user experience without rewriting their stack as a single-page application.
Developers choose Pjax because it's dependency-free, easy to integrate into existing projects, and significantly speeds up page loads by avoiding redundant resource fetches. Its flexibility in configuring selectors and support for CSS animations make it a lightweight alternative to heavier SPA frameworks.
Easily enable fast Ajax navigation on any website (using pushState + xhr)
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Written entirely in vanilla JavaScript, Pjax eliminates the need for jQuery or other libraries, keeping the bundle small (around 6kb gzipped) and reducing external dependencies.
It updates only designated page sections using CSS selectors, preserving CSS and JavaScript resources across navigations to speed up page loads and reduce HTTP requests.
Fully integrates with pushState for seamless back/forward button and keyboard navigation, ensuring a native-like experience without full page reloads.
Supports smooth page transitions through configurable switch callbacks like sideBySide, allowing for custom animations with libraries like Animate.css.
Pjax requires consistent DOM selectors across pages; if the new page lacks matching elements, it falls back to standard navigation, which can break on dynamically generated content.
JavaScript that relies on DOM ready events (e.g., Disqus integrations) needs manual re-initialization via pjax:success events, adding complexity and potential for bugs.
The library assumes responses are HTML, so handling non-HTML content or APIs requires overriding handleResponse, as noted in the README for custom processing.