Why do we need products like Pusher and Socket.io to establish a connection to the web connector?

Question

I recently read about websites and SaaS like Pusher and Socket.io while working on my Laravel chat application. I don’t understand why we need to use external software to establish a network connection? Can server code like Laravel directly establish a connection to an interface like Vue.js? Why should it go through an intermediary like Pusher and Socket.io? Sorry for the noob question.

Answer 1

It's not obligatory.

Websocket.

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Answer 2

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