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mediumTechnical2024

WebSocket reconnect logic

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01

Understand the problem

Implement the scenario utility: WebSocket reconnect logic. Discuss edge cases, runtime performance, and alternative paradigms.

js-codingutilityalgorithm
02

Attempt it yourself

Sketch your approach before reading the solution — that's what interviews test.

Nudge consolestandby

Stuck? Beam a request up — the console returns a conceptual nudge that guides your logic without spoiling the implementation.

03

Study the solution

💡 How to Think About This Problem

When implementing WebSocket reconnect logic in a frontend interview, candidate developers should focus on structural correctness, managing execution bindings, and minimizing performance overhead.

1. Deconstructing the Requirements

To build a robust solution for **WebSock

Solution ready — 2 min read

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04

Read the code

Example usage
function createReconnectingWS(url, onMessage, delay = 2000) {
  let ws;
  let active = true;
  function connect() {
    if (!active) return;
    ws = new WebSocket(url);
    ws.onmessage = onMessage;
    ws.onclose = () => {
      if (active) setTimeout(connect, delay);
    };
  }
  connect();
  return { close: () => { active = false; if (ws) ws.close(); } };
}

// Example placeholder
// const ws = createReconnectingWS('ws://localhost:8080', msg => console.log(msg.data));
05

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