JavaScript building blocksĬontinues our coverage of JavaScript's key fundamental features, turning our attention to commonly-encountered types of code blocks such as conditional statements, loops, functions, and events. The complete modules available there are as follows: JavaScript first stepsĪnswers some fundamental questions such as "what is JavaScript?", "what does it look like?", and "what can it do?", along with discussing key JavaScript features such as variables, strings, numbers, and arrays. Head over to our Learning Area JavaScript topic if you want to learn JavaScript but have no previous experience with JavaScript or programming. However, the two programming languages have very different syntax, semantics, and use. Both "Java" and "JavaScript" are trademarks or registered trademarks of Oracle in the U.S. And in cases where some proposals for new ECMAScript features have already been implemented in browsers, documentation and examples in MDN articles may use some of those new features.ĭo not confuse JavaScript with the Java programming language. The JavaScript documentation throughout MDN is based on the latest draft versions of ECMA-262 and ECMA-402. The standards for JavaScript are the ECMAScript Language Specification (ECMA-262) and the ECMAScript Internationalization API specification (ECMA-402). For information about API specifics to Web pages, please see Web APIs and DOM. This section is dedicated to the JavaScript language itself, and not the parts that are specific to Web pages or other host environments. JavaScript is a prototype-based, multi-paradigm, single-threaded, dynamic language, supporting object-oriented, imperative, and declarative (e.g. While it is most well-known as the scripting language for Web pages, many non-browser environments also use it, such as Node.js, Apache CouchDB and Adobe Acrobat. JavaScript ( JS) is a lightweight, interpreted, or just-in-time compiled programming language with first-class functions.
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