Instruction: Explain how to implement server-sent events in a Node.js application for real-time data streaming to clients.
Context: This question assesses the candidate's ability to implement SSE in Node.js for sending real-time notifications or data streams to web clients, covering setup, event generation, and client handling.
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Firstly, to set up SSE in a Node.js environment, you need to establish an endpoint that clients can request to initiate the SSE connection. This involves using an existing Node.js framework, like Express, which simplifies handling HTTP requests.
Step 1: Setting up the Express Server ```javascript const express = require('express'); const app = express(); const PORT = 3000;...