Laravel: Let’s understand the Working of Laravel Echo

Laravel Echo is a tool that makes it easy for you to bring the power of WebSockets to your Laravel Development. It simplifies some of the more common—and more complex—aspects of building complex WebSockets interactions.

Echo comes in two parts: A series of improvements to Laravel’s Event broadcasting system, and a new JavaScript package.

The backend components of Echo are baked into the Laravel core by default as of 5.3, and don’t need to be imported (so it’s different from something like Cashier). You could use these backend improvements with any JavaScript frontend, not just those using the Echo JavaScript library, and still see some significant improvements in ease-of-use for working with WebSockets. But they work even better when you use the Echo JavaScript library.

The Echo JavaScript library can be imported via NPM and then imported into your app’s JavaScript. It’s a layer of sugar on top of either Pusher JS (the JavaScript SDK for Pusher) or Socket.io (the JavaScript SDK many folks use on top of Redis WebSockets architectures).

When using the Echo?

Before we go any further, let’s take a look at how you might use the Echo, to see if it’s even something you might be interested in.

WebSockets will be useful to you if you want to send messages to your users—whether those messages are notifications or even updates to the structure of a page’s data—while the users stay on the same page. True, you could accomplish this with long-polling, or some sort of regularly scheduled JavaScript ping, but this has the potential to overwhelm your server pretty quickly. WebSockets are powerful, don’t overload your servers, can scale as much as you’d like, and they’re nearly instantaneous.

If you want to use WebSockets within a Laravel app, Echo provides a nice, clean syntax for simple features like public channels and complex features like authentication, authorization, and private and presence channels.

Conclusions :

The most important benefits that Echo provides are completely invisible. While you may agree that this is powerful stuff and opens up a ton of opportunities, you might be tempted to say “but Echo is hardly doing anything!”

However, what you’re not seeing is how much work you would do to set up authentication, channel authorization, presence callbacks, and more if you weren’t using Echo.

Some of these features exist in Pusher JS and Socket.io, with varying levels of difficulty, but the Echo makes them simpler and provides consistent conventions. Some of the features don’t exist in the other libraries at all, or at least not as a single, simple feature. The echo takes what could be slow and painful with other socket libraries and makes it simple and easy.

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