Test and Debug WebSocket Connections Instantly WebSocket Echo Tester tool for network operations.

The tool works under the hood by utilizing client-side JavaScript and browser APIs, specifically the WebSocket API, to establish and manage connections to WebSocket servers. It uses the `WebSocket` constructor to create a new connection to the specified URL, which can be either unencrypted (`ws://`) or TLS-encrypted (`wss://`). The tool also employs React hooks, such as `useState` and `useCallback`, to manage state and handle events, including connection establishment, message sending and receiving, and disconnection. When a user inputs a WebSocket URL and clicks the "Connect" button, the tool attempts to establish a connection using the `WebSocket` constructor and sets up event listeners for `onopen`, `onmessage`, `onclose`, and `onerror` events. The `addLog` function is used to update the log of sent and received messages in real-time, which includes errors and connection status updates.

The tool's input validation is handled using React's built-in event handling mechanisms, ensuring that edge cases are properly managed. For example, when a user attempts to send a message while not connected to a WebSocket server, an error message is logged indicating that the connection is not established. The tool also uses ES6+ features, such as destructuring and arrow functions, to improve code readability and maintainability. In terms of data structures, the tool uses arrays to store log entries, which are objects containing information about each message, including its type, content, and timestamp. The log entries are then rendered in a scrollable list using React's `map` function, with each entry displayed in a specific color based on its type (e.g., sent messages are blue, received messages are green).

The tool's mobile-first responsive design ensures that it can be used effectively on a variety of devices and screen sizes. The WebSocket API is used to send and receive messages in real-time, allowing the tool to display instantaneous results without requiring any server-side setup or data transmission. By following standards and RFCs, such as RFC 6455, which defines the WebSocket protocol, the tool ensures that it can communicate effectively with WebSocket servers and provide accurate results. The `useRef` hook is used to store a reference to the WebSocket object, allowing the tool to access its properties and methods, such as `send` and `close`, throughout its lifecycle.