jaPassive

jaPassive is a JavaScript library designed to simplify the management of passive event listeners. Passive event listeners are a performance optimization technique that allows the browser to execute default actions (like scrolling) without waiting for JavaScript event handlers to complete. This is particularly useful for touch events and scroll events, where responsiveness is crucial.

The library provides a simple API to add and remove passive event listeners. Instead of the standard `element.addEventListener('scroll', handler, { passive: true })`, jaPassive allows for a more concise syntax, such as `jaPassive.on(element, 'scroll', handler)`. This abstraction aims to make it easier for developers to implement this performance enhancement consistently across their applications.

jaPassive handles the nuances of browser support for passive event listeners automatically. Older browsers that do not support the `passive` option will still have their event listeners attached in the traditional, non-passive way. This ensures compatibility without requiring developers to write browser-specific code. The library also offers a corresponding `off` method for removing event listeners that were attached using jaPassive. The primary benefit of using jaPassive is its ability to improve perceived performance by preventing JavaScript execution from blocking default browser behaviors during event handling.