Node.js 19 also includes several security improvements like improved protection against buffer overflows, improved cryptography support, and better process isolation. In this article, you will know the updates in node js 19.
What is Node Js?
Node.js has become the backend platform of choice for many developers because of its performance, speed, scalability, support for asynchronous I/O, ease of use, and rich ecosystem (npm). Node.js is open source and free for commercial use under the MIT License, but you can also purchase a commercial license if needed. Node.js has become the backend platform of choice for many developers because of its performance, speed, scalability, support for asynchronous I/O, ease of use, and rich ecosystem (npm).
Updates 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.
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 of XML, JSON, and binary data on the fly as it flows through your application.
This means you can use WebCrypto to encrypt requests at run time instead of sending sensitive information over the wire twice. Node.js 19 includes support for WebAssembly in both V8 and WCF. The Node community has been working hard on implementing the necessary features to make WASM work within an application.
This allows you to create a new server using Node.js and Webpack but with all your application logic in a separate file. This makes it easier to test your application as it becomes more complex. Node.js 19 introduces a new ” MVC ” module that helps developers build their applications using the Model-View-Controller (MVC) architecture. This alternative to the more traditional plugin model can be used with any framework or library. MVC is a design pattern that separates an application into three parts: Model, View, and Controller. The model is responsible for holding the data used by the view to render the application. The controller is what controls the flow of data between models and views. Node’s MVC framework is getting a major in Node 19 to build applications with multiple front-ends and back-ends.
A Web API is a server-side service that uses HTTP as its transport protocol. It allows you to build modular, decoupled applications using JSON as its data format. Node.js 19 introduces a new module called “Web API” that helps developers build their applications using the Model-View-Controller (MVC) architecture. This alternative to the more traditional plugin model can be used with any framework or library. In this release, we also added support for creating an API endpoint using Web API. The API endpoints are automatically configured with Swagger, so it’s easy for your users to interact with your application and get information about their accounts or view their transactions.
Custom ESM Resolution Adjustments:
While Node.js is slowly declining in its growth predictions, it will most definitely remain relevant for another couple of years, as the current number of developers already working with Node.js far exceeds the predicted amount for growth, which is even lower.
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