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This article mainly explains "JavaScript belongs to the program", the content of the explanation in the article is simple and clear, easy to learn and understand, the following please follow the editor's ideas slowly in depth, together to study and learn "JavaScript belongs to the program" bar!

JavaScript is a lightweight, interpretive or just-in-time programming language with function priority; JavaScript is a dynamic scripting language based on prototype programming and multi-paradigm, and supports object-oriented, imperative, declarative and functional programming paradigms.

This article operating environment: windows7 system, javascript1.8.5 version, DELL G3 computer

What is the program of JavaScript?

JavaScript (JS for short) is a lightweight, interpretive or just-in-time programming language with function priority. Although it is known as a scripting language for developing Web pages, it is also used in many non-browser environments. JavaScript is based on prototype programming, multi-paradigm dynamic scripting language, and supports object-oriented, imperative, declarative, and functional programming paradigms.

JavaScript was first designed and implemented in Netscape Navigator browser by Brendan Eich of Netscape in 1995. Because Netscape works with Sun, Netscape management wants it to look like Java, so it is named JavaScript. But in fact, its grammar style is similar to that of Self and Scheme.

The standard of JavaScript is ECMAScript. As of 2012, all browsers fully support ECMAScript 5.1, and older browsers support at least the ECMAScript 3 standard. On June 17, 2015, ECMA International released the sixth edition of ECMAScript, which is officially called ECMAScript 2015, but is often referred to as ECMAScript 6 or ES2015.

Background

JavaScript was originally designed by Netscape's Brendan Eich, initially named its scripting language LiveScript, and later renamed JavaScript after working with Sun. JavaScript was originally inspired by Java, one of the purposes is to "look like Java", so there are grammatical similarities, some names and naming conventions are also borrowed from Java, but the main design principles of JavaScript are derived from Self and Scheme. The similarity between JavaScript and Java is the result of an agreement reached with Sun Microsystems for marketing considerations by Netscape at that time. Microsoft also launched a scripting language for JScript to compete with JavaScript at the same time.

In the early stage of development, the standard of JavaScript was not determined, and there were Netscape's JavaScript, Microsoft's JScript and CEnvi's ScriptEase during the same period. For interoperability, Ecma International (formerly known as the European Association of computer Manufacturers) created the ECMA-262 standard (ECMAScript), both of which belong to the implementation of ECMAScript. Although JavaScript is promoted and promoted as a scripting language for non-programmers, rather than as a scripting language for programmers, JavaScript has very rich features. [10] in 1997, under the coordination of ECMA (European Association of computer Manufacturers), a working group composed of Netscape, Sun, Microsoft and Borland decided on a unified standard: ECMA-262. The complete JavaScript implementation consists of three parts: ECMAScript, document object model, and browser object model. [9]

JavaScript is a registered trademark of Oracle. Ecma International has formulated the ECMAScript standard based on JavaScript. JavaScript can also be used in other situations, such as server-side programming (Node.js).

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