Node.js 19 - What changes and effects does it bring to the business?

Can use globalThis.crypto Use the require function: require (‘node : crypto’).webcrypto const { subtle } = globalThis.crypto; (async function () { const keyObject = await subtle.generateKey( { name: 'HMAC', hash: 'SHA-256', length: 256, }, true, ['sign', 'verify'] ); console.log('key :', keyObject); const enc = new TextEncoder(); const encodedMessage = enc.encode('I love pizza'); console.log('message :', encodedMessage); const digest = await subtle.sign( { name: 'HMAC', }, keyObject, encodedMessage ); console.log('digest :', digest); })();

Now, if we run the server the output will: key = CryptoKey { type: 'secret', extractable: true, algorithm: { name: 'HMAC', length: 256, hash: [Object] }, usages: [ 'sign', 'verify' ] } message = Uint8Array(15) [ 73, 32, 108, 111, 118, 101, 32, 99, 117, 112, 99, 97, 107, 101, 115 ] digest = ArrayBuffer { [Uint8Contents]: , byteLength: 32 } Read More: Node.js vs Django: which one is better for backend development in 2022 V8 JavaScript engine is used for V8 10.7 Node version 19 offers support for the latest version of Google V8 JS engine 10.7. It helps in terms of the development project being updated with JavaScript features and improves the performance. The V8 JavaScript engine is the runtime environment that executes JavaScript code, it helps developers as they do not need to worry about the platform like whether it will work on Linux, Windows, macOS, or hardware. Custom ESM Resolution adjustments

Node.js has removed the –experimental-specifier-resolution flag with the release of v19, as the same functionality, can be achieved with the use of a custom loader. Dropped DTrace/SystemTap/ETW Support DTrace is used to get a comprehensive view of the current system, which includes memory, CPU time, filesystem, and network utilized by the current process. DTrace is a useful tool but it requires much work. That is the reason why node.js no longer supports DTrace/SystemTap/ETW in v19.0.0. The priority of the resources is the key. Maintaining support’s complexity is not worth it without a proper strategy for supporting this. Planning to hire dedicated ReactJS developers for your business project? Contact us HTTP(S)/1.1 KeepAlive by default Node.js 19 sets this true by default. It means that any outgoing HTTP(s) connection will by default use HTTP 1.1 keepAlive. The default duration is 5 seconds. Enable keepAlive will give better performance and output as the connection will automatically be reused. And the agent is also able to parse the response keepAlive that the server might send. It helps the client side to find how much time the connection will stay alive. And the server will automatically disconnect idle clients when the close() method is called. Node.js 18 has been promoted to LTS With the release of Node.js v19, Node.js v18 is now upgraded to LTS, making it ready for Production. Experimental Fetch Experimental Test Runner ECMAScript modules improvements Updated Platform Support OPENSSL 3 Support V8 version 10.2 Improvement in support for AbortController and AbortSignal Default DNS resolution Read More: Why NodeJS is Very Popular for Developing Enterprise Level Applications? Key changes in major Node versions We know that all of the main versions are current for the next six months. However, as an application developer, it is vital to understand the latest three major Node versions, namely Node 18, Node 17, and Node 16, as well as the primary modifications and what has been introduced to make the application extremely performant. Node.js version 18: Node.js version 18 is given the codename of ‘Hydrogen’. Major features of Node v18: Upgrade of the V8 engine to 10.1 Global Fetch Enable by Default Core Test Runner Module 1) Upgrade of the V8 engine to 10.1: Node.js uses a V8 JavaScript engine in the background, making JavaScript code compilation into native machine codes easy. And it also improves the performance of server applications. In node v18, the V8 engine is upgraded to 10.1 which is part of chromium 101. There are also new methods available in Node v18: upgrades in the Intl.Locale API findLast and findLastIndex() array methods Performance improvements for class fields and private class methods. Looking to hire .NET developer for your business project? Contact us 2) Global Fetch Enable by Default: Fetch API is one of the most used to make an HTTP request on the web. Before node v18 developers need to install the packages to get responses from APIs and fetch the data. In previous versions of the node to make HTTP requests, it needed the use of XMLHttpRequest API, and it increases the number of lines in terms of coding. 3) Core Test Runner Module: Before node v18 there was no test runner available in the node. From v18 the test runner module will be available using the node: prefix. With this implementation, there is no need for external packages for test runners from now on. The node: test module helps in the easy creation of JavaScript tests that return output in TAP format. Node.js version 17:

Major features in Node.js version 17: More promisified APIs Stack traces with Node.js version 1)More Promisified APIs: It is a continuous initiative within the node project to provide promised-based node.js core APIs. In node v15 Timers Promises APIs and Streames Promises APIs were added. In node v17, new promise-based APIs were added for the Readline module. It provides an interface to read data from a Readable Stream one line at a time. 2)Stack traces with Node.js version: Stack traces are an important part of diagnosing errors, to help developers to find what went wrong. In node v17, the version of the node will be displayed at the end of the stack traces where fatal errors stop the execution. Read More: MEAN vs MERN - What to choose for your web development project? Node.js version 16:

Major features in Node.js version 16: Node v16 is the first release to have built-in binaries for Apple silicon shipped with it. Implementation of standard Web Crypto API. Updated NPM to version 7.10.10 Abort Controller was introduced in Node.js version 15 and is stabilized in version 16, and it allows to reject or abort any kind of promise-based API. String encoding methods atob and btoa for compatibility with web platform API. Conclusion Node version 19 has brought tremendous updates over v18, however, it won’t be converted into the LTS version due to the odd number series. Still, it is good to play around with NodeJS v19 as it helps with performance improvement. We created this blog to help you understand the Node.js 19 improvements and their implications for application development. Thank you for taking the time to read this article. If you have any questions or searching for a reputed Node.js application development company, do not hesitate to contact us.