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Modern JavaScript - Introduction to ECMAScript ...
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Yusuke Miyazaki
June 20, 2016
Programming
0
240
Modern JavaScript - Introduction to ECMAScript 2015 & 2016
Simple example of proper tail calls:
https://gist.github.com/ymyzk/b0e065956978faed5116c4cacbb8efe5
Yusuke Miyazaki
June 20, 2016
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Transcript
Introduction to ECMAScript 2015 & 2016 ޒेཛྷɾӬݚڀࣨன৯ձ :VTVLF.JZB[BLJ !૯߹ݚڀ߸ؗ Modern
JavaScript
Javascript?
JavaScript • Not Javascript • cf. OCaml
Why JavaScript? • Used in everywhere! • Web Browsers (Desktop
& Mobile) • Node.js (Server)
Table of Contents • History of JavaScript • Features of
ECMAScript 2015 & 2016 • How to Write Modern JavaScript
JavaScript & ECMAScript • JavaScript (JS) • Programming language •
ECMAScript (ES) • Language specification (ECMA-262) standardized by Ecma International • Other standards: ECMA-334 (C#)
History of JavaScript
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
History of ECMAScript • Edition 1: June 1997 • Edition
2: June 1998 • Edition 3: December 1999 • Edition 4: Abandoned!!
History of ECMAScript • Edition 5: December 2009 • Almost
supported in so-called "modern" browsers • Features • strict mode • Array.prototype.map/filter/reduce • JSON
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
History of ECMAScript • Edition 6: June 2015 • Implementation
in progress… • WebKit 100%? • Firefox/Edge/Chrome/Node.js 90%+ • See compat table for more details
History of ECMAScript • Edition 7: June 2016 • Minor
update from ECMAScript 2015
Features of ES 2015 & 2016
Demo
Links • http://kangax.github.io/compat-table/es6/ • http://es6-features.org/ • https://webkit.org/blog/6240/ecmascript-6- proper-tail-calls-in-webkit/
How to Write Modern JavaScript
Use modern impl. • Server-side app. (Node.js 6+) • Support
only modern web browsers
Use Transpilers • Compile JS code to JS code •
e.g. ECMAScript 2015 -> ECMAScript 5 • Implementations • Babel • Traceur
Conclusion • JavaScript is getting better day by day •
Write "modern" JavaScript • Use some tools to write modern JavaScript
Q&A