![]() ![]() The El Niño phase occurs when these ocean temperatures are warmer than normal for an extended period. This winter will be the first in a few years to feel the effects of the phenomenon, which has a sizable impact on the weather during the coldest months of the year.Įl Niño is one of three phases of the El Niño Southern Oscillation, which tracks water temperature changes in the equatorial Pacific Ocean that can have rippling effects on weather patterns around the globe. Most of the time, this happens between the stages 3 and 4, and is usually before the spec is officially published.Fall has only just begun, but it’s not too soon to look ahead to winter, especially since this one may look drastically different than recent years because of El Niño. This means that 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. As soon as one browser implements a feature, we try to document it. ![]() The standards for JavaScript are the ECMAScript Language Specification (ECMA-262) and the ECMAScript Internationalization API specification (ECMA-402). For information about APIs that are specific 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's dynamic capabilities include runtime object construction, variable parameter lists, function variables, dynamic script creation (via eval), object introspection (via for.in and Object utilities), and source-code recovery (JavaScript functions store their source text and can be retrieved through toString()). ![]() 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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