Introduction to ECMAScript 2015 & 2016
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Modern JavaScript
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Javascript?
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JavaScript
• Not Javascript
• cf. OCaml
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Why JavaScript?
• Used in everywhere!
• Web Browsers (Desktop & Mobile)
• Node.js (Server)
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Table of Contents
• History of JavaScript
• Features of ECMAScript 2015 & 2016
• How to Write Modern JavaScript
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JavaScript & ECMAScript
• JavaScript (JS)
• Programming language
• ECMAScript (ES)
• Language specification (ECMA-262)
standardized by Ecma International
• Other standards: ECMA-334 (C#)
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History of JavaScript
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Beginnings of JavaScript
"JavaScript was originally developed in 10 days in
May 1995 by Brendan Eich, while he was working
for Netscape Communications Corporation."
From Wikipedia
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History of ECMAScript
• Edition 1: June 1997
• Edition 2: June 1998
• Edition 3: December 1999
• Edition 4: Abandoned!!
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History of ECMAScript
• Edition 5: December 2009
• Almost supported in so-called "modern" browsers
• Features
• strict mode
• Array.prototype.map/filter/reduce
• JSON
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History of ECMAScript
• Edition 6: June 2015
• ECMAScript 2015, not ECMAScript 6
• ECMAScript will be released annually
• Stages: 0 Strawman -> 1 Proposal ->
2 Draft -> 3 Candidate -> 4 Finished
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History of ECMAScript
• Edition 6: June 2015
• Implementation in progress…
• WebKit 100%?
• Firefox/Edge/Chrome/Node.js 90%+
• See compat table for more details
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History of ECMAScript
• Edition 7: June 2016
• Minor update from ECMAScript 2015