What’s New in Node.Js 19?

Here are the new updates of node js 19:

The HTTP(S)/1.1 KeepAlive:

The KeepAlive header field is an experimental web technology whose use can be considered a workaround for the lack of persistent connections in HTTP/1.1 servers and has been obsoleted by more recent specifications. The HTTP/2 protocol supports persistent connections, a major improvement over HTTP/1.1. However, one HTTP feature that has been a long-standing request from the community is to add the ability to send KeepAlive headers in the opposite direction.

This would allow clients to keep connections open between requests without having to do any special work on the server side to achieve it. This is especially useful for mobile applications with intermittent connectivity issues, and your app needs to keep working even when temporarily unavailable. The KeepAlive header field defines a mechanism to allow clients to request multiple requests without sending requests repeatedly. The client can send the first request, which the server will forward, and then, later on, it can send additional requests without waiting for the previous one to finish.

Experimental Node:

In the experimental Node, you can use the keepalive option to specify the number of seconds that keep-alive connections should be maintained. The value is specified in seconds and must be between 1 and 10 seconds.

The experimental feature allows you to specify a maximum number of connections to open on the server, which can improve performance for your application if there are more clients than available connections. The default value for this option is 10 seconds, which means that all connections will use a timeout of 10 seconds before being closed by the server. The minimum value is 1 second and the maximum value is 10 seconds.

Stable WebCrypto (WCF):

Node.js 19 will officially support WCF (Windows Communication Foundation) and its new stable web crypto implementation, which allows the browser to communicate securely with the server without sending any sensitive data in clear text, even over HTTP. WebCrypto (WCF) is the new IIS feature that allows you to encrypt and decrypt data securely. WebCrypto is a WCF feature that enables encryption and decryption…