Download _TOP_ Javascript Runtime Environment

When debugging or, possibly, when trying to decide upon the best approach to solving a problem around timing and scheduling of tasks and microtasks, there are things about how the JavaScript runtime operates under the hood that may be useful to understand.

Starting with the addition of timeouts and intervals as part of the Web API (setTimeout() and setInterval()), the JavaScript environment provided by Web browsers has gradually advanced to include powerful features that enable scheduling of tasks, multi-threaded application development, and so forth. To understand where queueMicrotask() comes into play here, it's helpful to understand how the JavaScript runtime operates when scheduling and running code.

Download Javascript Runtime Environment

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The microtask queue has been around for a while, but it's historically been used only internally in order to drive things like promises. The addition of queueMicrotask(), exposing it to web developers, creates a unified queue for microtasks which is used wherever it's necessary to have the ability to schedule code to run safely when there are no execution contexts left on the JavaScript execution context stack. Across multiple instances and across all browsers and JavaScript runtimes, a standardized microqueue mechanism means these microtasks will operate reliably in the same order, thus avoiding potentially difficult to find bugs.

A JavaScript runtime environment is software/ platform that offers the tools/ libraries/ infrastructure needed to execute JavaScript code on a computer. The runtime environment determines the global objects your JavaScript program will access and impacts how that program will run.

Bun is a platform that allows developers to build, test, run, and bundle TypeScript and JavaScript projects. This all-in-one runtime and toolkit has a test runner, bundler, and package manager compatible with Node.js. Bun runs on Windows, Linux, and macOS.

Deno is presented as a next-generation JavaScript runtime. This tool is built on the V8 JavaScript engine and is backward compatible with npm and Node.js. Deno is designed to support JavaScript extensions like JSX and TypeScript without extra configuration or build steps.

Blueboat is a serverless JavaScript runtime. The platform is compatible with standard web APIs and has built-in features like Request, Response, URL, and fetch. As a distributed native system, Blueboat focuses on frictionless scalability where local resources are replaced by their cloud equivalents.

Napa.js is a multi-threaded JavaScript runtime. This platform is built on top of V8 JavaScript and was originally designed to support the development of highly iterative services in Bing. However, this runtime has evolved and is now a good Node.js complement.

WasmEdge is an extensible, lightweight WebAssembly runtime for edge, cloud-native, and decentralized applications. This runtime powers embedded functions, serverless apps, IoT devices, smart contracts, and microservices.

The platform offers a well-defined execution sandbox for the WebAssembly byte code program. This software protects and isolates operating system resources like processes, environment variables, sockets, and file systems.

Ts-node is designed to support a variety of options. You can specify these options programmatically, as environment variables, through tsconfig.json, or as CLI flags. The tsconfig.json method is the most preferred.

You now have a variety of JavaScript runtime environments that you can use on your next JavaScript project. Even though Node.js is the most-used JavaScript runtime, you can still use the rest, depending on the nature of the project and your preferences.

Deno and Bun are both direct competitors to Node.js. Deno is a secure runtime for JavaScript and TypeScript that has been extended for WebAssembly, JavaScript XML (JSX), and its TypeScript extension (TSX). Developed by Node.js creator Ryan Dahl (notice Deno is an anagram of Node), Deno is an attempt to reimagine Node to leverage the advances in JavaScript since 2009, including the TypeScript compiler.

Like Node.js, Deno is essentially a shell around the Google V8 JavaScript engine, but unlike Node, it includes the TypeScript compiler in its executable image. Dahl, who created both runtimes, has said that Node.js suffers from three major issues: a poorly designed module system based on centralized distribution; lots of legacy APIs that must be supported; and lack of security. Deno addresses all three problems.

Bun is a fast all-in-one JavaScript runtime, still in its beta-test phase. Bun is a modern JavaScript runtime like Node or Deno. It was built from scratch to focus on three main goals: to start fast (it has edge computing in mind); to achieve new levels of performance (extending the JavaScriptCore engine); and to be a complete tool (including a bundler, a transpiler, and a package manager).

To summarize, Node.js is a cross-platform JavaScript runtime environment for servers and applications. It is built on a single-threaded, non-blocking event loop, the Google Chrome V8 JavaScript engine, and a low-level I/O API. Various techniques, including the cluster module, allow Node.js apps to scale beyond a single CPU core. Beyond its core functionality, Node.js has inspired an ecosystem of more than a million packages that are registered and versioned in the NPM repository and can be installed using the NPM command line or an alternative such as Yarn.

I wonder if there is a 'local runtime environment' for hosting Javascript code, that's not browser based, for running small local apps? Something like WSH (Windows Scripting Host) for JavaScript (not MS-JScript).

Alternatively, how might one consider running a browser in 'local' mode only? ie: launch, run-code, exit, perhaps with command-line switches/options, without too much overhead? If so, which browser? FireFox? Might it be possible to somehow 'extract' the JS runtime engine/DLL and call that?

Node.js provides a server-side runtime environment for executing JavaScript outside the browser. Because it executes JavaScript outside the browser, it does not have access to the web APIs. Instead, the Node.js runtime environment replaces it with something called C++ bindings and the thread pool.

This article provides a high-level overview of the main concepts. It explains how the JavaScript engine executes code, the runtime, and its components. It also goes on to explain optimization strategies and highlight performance considerations.

Here we will detect in which runtime environment our code is running. A JavaScript code written in Node.js can also run in any of the environments whether it is a browser environment, service worker environment, or a Node.js environment itself. On running a code in a different environment you need to match all the needs of that environment.

To check if the runtime environment of a code is a browser or not there is no direct method. So to check the runtime environment we have to put some conditions to match with every environment and check in which environment our code is running.

This feature of JavaScript allows you to write your code in any environment and run it in any other different environment especially in the web browser while using a web page that only runs in a web browser.

Saying executable files implies erroneously that applications built for desktop execution can be executed in the browser. See WebAssembly. It says WebAssembly (abbreviated Wasm ) is a binary instruction format for a stack-based virtual machine. And it says WebAssembly describes a memory-safe, sandboxed execution environment.

Node.js is a cross-platform, open-source JavaScript runtime environment that can run on Windows, Linux, Unix, macOS, and more. Node.js runs on the V8 JavaScript engine, and executes JavaScript code outside a web browser.

Node.js was initially written by Ryan Dahl in 2009,[10] about 13 years after the introduction of the first server-side JavaScript environment, Netscape's LiveWire Pro Web.[11] The initial release supported only Linux and Mac OS X. Its development and maintenance was led by Dahl and later sponsored by Joyent.[12]

In January 2010, a package manager was introduced for the Node.js environment called npm.[18] The package manager allows programmers to publish and share Node.js packages, along with the accompanying source code, and is designed to simplify the installation, update and uninstallation of packages.[17]

The open-source community has developed web frameworks to accelerate the development of applications. Such frameworks include Connect, Express.js, Socket.IO, Feathers.js, Koa.js, Hapi.js, Sails.js, Meteor and Derby.[17][38] Various packages have also been created for interfacing with other languages or runtime environments such as Microsoft .NET.[39] 2351a5e196