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Babel is a free and open-source JavaScript transcompiler that is mainly used to convert ECMAScript 2015+ (ES6+) code into backwards-compatible JavaScript code that can be run by older JavaScript engines. It allows web developers to take advantage of the newest features of the language. [4]
The JavaScript shell provides a simple way to run scripts in batch mode or within an interactive environment for exploratory programming. It can be used in applications by embedding Rhino. A slightly modified version of Rhino 1.6r2 comes bundled with the Sun Microsystems release of Java SE version 6, which was released in December 2006. This ...
ECMAScript is a JavaScript standard developed by Ecma International. Since 2015, major versions have been published every June. ECMAScript 2024, the 15th and current version, was released in June 2024.
CL-JavaScript: Can compile JavaScript to machine language on Common Lisp implementations that compile to machine language. [11] BESEN: A complete JIT-compiling implementation of ECMAScript Fifth Edition written in Object Pascal. [12] Hermes: developed by Facebook for React Native mobile apps [13] Can also be used independent from React Native.
Previously, JavaScript only supported function scoping using the keyword var, but ECMAScript 2015 added the keywords let and const, allowing JavaScript to support both block scoping and function scoping. JavaScript supports automatic semicolon insertion, meaning that semicolons that normally terminate a statement in C may be omitted in ...
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 lets developers use JavaScript to write command line tools and for server-side scripting.
CommonJS's specification of how modules should work is widely used today for server-side JavaScript with Node.js. [1] It is also used for browser-side JavaScript, but that code must be packaged with a transpiler since browsers don't support CommonJS. [1]
In version 41 of Chrome in 2015, project TurboFan was added to provide more performance improvements with previously challenging workloads such as asm.js. [11] Much of V8's development is strongly inspired by the Java HotSpot Virtual Machine developed by Sun Microsystems , with the newer execution pipelines being very similar to those of HotSpot's.