These are new generation ECMAScript engines for web browsers, all implementing just-in-time compilation ( JIT) or variations of that idea. This edition 5.1 of the ECMAScript standard is fully aligned with third edition of the international standard ISO/IEC 16262:2011.īrian Terlson, Bradley Farias, Jordan Harband
Adds some new features, such as getters and setters, library support for JSON, and more complete reflection on object properties. Clarifies many ambiguities in the 3rd edition specification, and accommodates behaviour of real-world implementations that differed consistently from that specification. Many features proposed for the Fourth Edition have been completely dropped some were incorporated into the sixth edition.Īdds “strict mode,” a subset intended to provide more thorough error checking and avoid error-prone constructs. ECMAScript is commonly used for client-side scripting on the World Wide Web, and it is increasingly being used for writing server applications and services using Node.js.ĮCMA-262.pdf, Github-ecma262, Github-test262Įditorial changes to keep the specification fully aligned with ISO/IEC 16262 international standardĪdded regular expressions, better string handling, new control statements, try/catch exception handling, tighter definition of errors, formatting for numeric output and other enhancementsįourth Edition was abandoned, due to political differences concerning language complexity. It was inspired by JavaScript and JScript and was created to help foster multiple independent implementations. ECMAScript is a general-purpose programming language, standardized by Ecma International according to the document ECMA-262.
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