![]() As part of Microsoft’s re-engineering of the Edge browser, it will also use the V8 JavaScript engine. ![]() While Chrome and Node.js use the Google V8 JavaScript engine, Firefox uses its own engine, SpiderMonkey. This enables websites to run JavaScript in client browsers and standalone JavaScript applications to run in Node.js. ![]() ![]() Browsers, like Chrome and Firefox, and application servers, like Node.js, include a runtime environment as part of the application. JavaScript programs rely on a JavaScript runtime environment for execution. Understanding JavaScript asynchronous code Understanding this difference is essential to understanding how to do asynchronous programming with JavaScript. It’s also going to explain an important difference between the way code execution works in JavaScript and other languages and frameworks. This post will show you how to use asynchronous functionality in JavaScript. Understanding how asynchronous features work in the JavaScript ecosystem, including the role played by external APIs, is an essential part of using the language effectively. In fact, many of the widely used asynchronous functions in JavaScript are not part of the core language. ![]() By design, JavaScript is a synchronous scripting language. ![]()
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