EventSource Polyfill

eventsource-polyfill provides a robust client-side polyfill for the W3C EventSource API, enabling Server-Sent Events (SSE) functionality in web browsers that lack native support, particularly older environments like Internet Explorer 8+ and Android browser 2.1+. The package aims to bridge the compatibility gap, ensuring that web applications can leverage SSE streams consistently across diverse browser landscapes. While the project saw its last significant update with version 0.9.7 in 2017, which addressed a critical bug related to 'data' events, its release cadence has ceased, indicating an abandoned status. Developers should be aware it's designed exclusively for browser applications, modifying the global window.EventSource object, and will not receive further updates or new features.