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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]
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]
For example, Tamarin – the virtual machine for ActionScript, developed and open-sourced by Adobe – has just-in-time compilation (JIT) support for certain classes of scripts. In addition to introducing new features, some ES3 bugs were proposed to be fixed in edition 4.
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 ...
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.
JavaScript-based web application frameworks, such as React and Vue, provide extensive capabilities but come with associated trade-offs. These frameworks often extend or enhance features available through native web technologies, such as routing, component-based development, and state management.
JSFiddle is an online IDE which is designed to allow users to edit and run HTML, JavaScript, and CSS code on a single page. [3] Its interface is minimalist and split into four main frames, which correspond to editable HTML, JavaScript and CSS fields and a result field which displays the user's project after it is run.
Vite (French:, like "veet") is a local development server written by Evan You, [2] the creator of Vue.js, and used by default by Vue and for React project templates. It has support for TypeScript and JSX. It uses Rollup and esbuild internally for bundling. [3]