What versions of ecmascript are there?

The versions are: 1. Version 1.0; 2. Version 2.0; 3. Version 3.0; 4. Version 5.0; 5. Version 5.1; 6. Version 2015 (referred to as ES6); 7. Version 2016 (referred to as ES7 ); 8. 2017 version (ES8); 9. 2018 version (ES9); 10. 2019 version (ES10).

The operating environment of this tutorial: Windows 7 system, ECMAScript version 6, Dell G3 computer.

ECMAScript is a script programming language standardized by Ecma International (formerly the European Computer Manufacturers Association) through ECMA-262. This language is widely used on the World Wide Web. It is often called JavaScript or JScript, so it can be understood as a standard for JavaScript, but in fact the latter two are implementations and extensions of the ECMA-262 standard.

ECMAScript (ES) version introduction (version release time)

##TimeVersionDescriptionJune 1997ES1.0 was releasedIn July of that year, the ECMA262 standard was releasedJune 1998ES2.0 releasedThis version has been modified to fully comply with the ISO/IEC 16262 international standard. December 1999ES3.0 was releasedbecame the common standard for JavaScript and received widespread supportOctober 2007ES4.0 draft was releasedMajor manufacturers had different opinions and the plan was not passed##2008 July MonthDecember 2009ES 5.0 officially released##June 2011ES5.1 releasedThis version became the ISO international standard (ISO/IEC 16262:2011)December 2013ES6 draft releasedJune 2015June 2016ES7 was released, also known as "ECMAScript 2016"June 2017ES8 was released, also known as "ECMAScript 2017" June 2018ES9 was released, also known as "ECMAScript 2018" ES10 Release, aka "ECMAScript 2019"

Released ES3.1 and renamed it ECMAScript 5	Abolished ECMAScript 4.0, so version 4.0 does not exist
ES6 was officially released and renamed "ECMAScript 2015"	TC39 The committee decided to release a version of ECMAScript every year
		##June 2019
		Specification address: ES6: http://www.ecma-international.org/ecma-262/6.0/ ES7: http://www.ecma -international.org/ecma-262/7.0/ ES8: http://www.ecma-international.org/ecma-262/8.0/ ES9: http://www.ecma-international.org /ecma-262/9.0/ ES10: http://www.ecma-international.org/ecma-262/10.0/ Related project address: ECMA TC39: https://github.com/tc39 ECMA 262: https://github.com/tc39/ecma262 proposals: https://github.com/tc39/proposals Others: View the latest version of ecma-262: https://www.ecma-international.org/publications/standards/Ecma-262.htm The relationship between JavaScript and ECMAScript JavaScript is a scripting language and ECMAScript is a specification. JavaScript is a scripting language based on the ECMAScript specification. JavaScript is only one implementation of ECMAScript, and there are other implementations. Supplementary explanation of professional terms: Ecma International: It is an international membership system information and telecommunications standards organization, 1994 Previously, it was called European Computer Manufacturers Association ##TC39 (Technical Committee 39): ESMA's Technical Expert Committee No. 39, responsible for formulating the ECMAScript standard. Members include Major companies such as Microsoft, Mozilla, and Google. ISO: International Organization for Standardization IEC: International Electrotechnical Commission, founded in 1906, it is the world's The earliest international electrotechnical standardization organization was established, responsible for international standardization work in the fields of electrical engineering and electronic engineering. ISO/IEC 16262:2011: ECMAScript language specification that complies with both ISO and IEC standards. It has been revised by ISO/IEC 22275:2018. ECMAScript (abbreviation: ES): A scripting language specification developed by Ecma International (formerly the European Computer Manufacturers Association) in accordance with the ECMA-262 and ISO/IEC 16262 standards . ECMA-262: Defines a set of keywords supported by ECMAScript. These keywords identify the beginning and end of an ECMAScript statement. According to regulations, keywords are reserved and cannot be used as Variable name or function name. ECMA 402: Develop some international API standards based on ECMAScript 5 or later versions. ECMA 404: JSON Specification. ECMA 414: Specifies which specifications are related to ECMAScript. Currently, it contains 262, 402 and 404. [Related recommendations: javascript learning tutorial]

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