This is an example on how Server Sent events can be used together with Shared workers to reduce connections.

Prerequisites

• PHP >= 7.3

Usage

To start the server:

    composer run start

Open either with-worker.html or without-worker.html in the browser. To use a worker, you need some sort of webserver (nginx, apache) when opening the with-worker.html, because the browser cannot load the worker file directly from the file system.

It is also possible to use PHPStorm's "Open in: Browser" feature to open the HTML file.

Debug shared worker

In chrome, open: chrome://inspect/#workers and click on inspect of the service worker

In Firefox, open: about:debugging#/runtime/this-firefox and click on Inspect of the service worker