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Today, the editor will share with you the relevant knowledge points about whether ECMAscript belongs to js. The content is detailed and the logic is clear. I believe most people still know too much about this knowledge, so share this article for your reference. I hope you can get something after reading this article. Let's take a look at it.

ECMAscript belongs to js. Js is a scripting language based on ECMAScript specification and encapsulated on this basis. ECMAScript, as a scripting language specification, is one of the three core components of js.

The operating environment of this tutorial: windows10 system, javascript1.8.5 version, Dell G3 computer.

Does ECMAscript belong to js?

JavaScript is a scripting language based on ECMAScript specification, and it is encapsulated on this basis. ECMAScript is not a programming language, but only a scripting language specification, which is developed and published by the European computer Association. Any scripting language implemented based on this specification must abide by its conventions.

A common question is, what exactly is the relationship between ECMAScript and JavaScript?

To make this issue clear, we need to review history. In November 1996, Netscape, the creator of javascript, decided to submit JavaScript to the International Organization for Standardization (ECMA), hoping that the language would become an international standard. The following year, ECMA released the first version of Standard document 262 (ECMA-262), which defined the standard for the browser scripting language and called it ECMAScript, version 1.0.

The standard was developed for the JavaScript language from the beginning, but it is not called JavaScript for two reasons. One is the trademark, Java is the trademark of Sun, according to the licensing agreement, only Netscape can legally use the name JavaScript, and JavaScript itself has been registered as a trademark by Netscape. Second, the maker of the language is ECMA, not Netscape, which helps to ensure the openness and neutrality of the language.

Therefore, the relationship between ECMAScript and JavaScript is that the former is the specification of the latter and the latter is an implementation of the former (other ECMAScript dialects also include Jscript and ActionScript). On daily occasions, the two words are interchangeable.

The three core components of Js

(1) ECMA (European Association of computer Manufacturers) defines the syntax standard of js.

(2) DOM is a document object model, which defines the display structure of the document, and can easily delete, add and replace nodes.

(3) BOM is the browser object model, which is the interactive object of learning browser window, such as search box, settings, etc., which are included in the browser.

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