Choosing a data push method for maximum compatibility and reliability

Data push from server to client has been an ongoing challenge since the advent of the web. Early developers had to rely on ingenuity and novel solutions like polling, which compromised performance. As demand for real-time features increased, dedicated methods for sending data from the server emerged. There are four main options: WebSockets, XHR streaming (HTTP streaming), Server-Sent Events, and Server-Sent Events with Ably. The best method depends on factors such as compatibility, efficiency, ease of implementation, and scalability. Data push is a pattern where the server chooses to push data to the client(s) immediately without waiting for them to ask for it. It minimizes latency compared to data pull but does not allow two-way communication over the same channel. When choosing a data push approach, consider factors such as network environment, dependency chain, device support, legacy browsers, developer resources, and bidirectional requirements. The importance of reliable and low-latency updates cannot be overstated, especially when serving large numbers of users or operating in unreliable mobile networks. WebSockets, XHR streaming, Server-Sent Events, and Server-Sent Events with Ably each have their own strengths and limitations. By examining these methods and evaluating their advantages and disadvantages, developers can make an informed decision about which method is best suited to their specific needs.