Zepto is a minimalist JavaScript toolkit providing an API for DOM manipulation, event handling, and asynchronous HTTP requests. It functions as a jQuery-compatible library, allowing developers to select, modify, and animate HTML elements using a concise and chainable syntax.
The library includes an asynchronous HTTP client for exchanging data with remote servers without triggering page reloads and a browser-based event handler that supports standard mouse events and mobile touch gestures.
Its capability surface covers CSS selector-based querying, element transition animations, and the serialization of web form data. It also provides systems for element-based data storage and the coordination of asynchronous workflows via promises.