JavaScript: The Past, Present and Future

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JavaScript The Past, Present and Future

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Kim Joar Bekkelund @kimjoar [email protected] Fagleder i JS-plattform Jobbet i BEKK siden 2011

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It all started at 1995

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Brendan Eich + 10 days = JavaScript

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What did we do with this new language? (You really don't want to know)

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CUT & PASTE

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… and this went on for almost 10 years

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2004

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2005

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What happened?

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What happened?

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What happened?

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What happened?

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JavaScript went from nothing to …

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"any application that can be written in JavaScript, will eventually be written in JavaScript." Atwood's Law

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JavaScript Where are we now?

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We expect more!

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SPA Single-page applications

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10/90? 50/50? 70/30?

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WebSockets Client Server Set up connection

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JavaScript + I/O Single-threaded, non-blocking

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Node.js in production?

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“Assembly language of the web”

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# Assignment: number = 42 opposite = true # Conditions: number = -42 if opposite # Functions: square = (x) -> x * x # Arrays: list = [1, 2, 3, 4, 5] # Objects: math = root: Math.sqrt square: square cube: (x) -> x * square x Inspired by Ruby and Python Several features will be added to the next JS version

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class Point { x: number; y: number; constructor(x: number, y: number) { this.x = x; this.y = y; } getDist() { return Math.sqrt( this.x * this.x + this.y * this.y ); } } var p = new Point(3,4); var dist = p.getDst(); console.log("Hypotenuse is: " + dist); Optional static typing. Superset of JS.

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data Person = Person { name :: String, age :: Number } showPerson :: Person -> String showPerson (Person o) = o.name ++ ", aged " ++ show o.age examplePerson :: Person examplePerson = Person { name: "Bonnie", age: 26 } Inspired by Haskell

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(ns example (:require [om.core :as om] [om.dom :as dom])) (defn widget [data owner] (reify om/IRender (render [this] (dom/h1 nil (:text data))))) (om/root widget {:text "Hello world!"} {:target (. js/document (getElementById "my-app"))}) A Lisp for the browser

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asm.js Speeding up compiled languages

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asm.js Speeding up compiled languages "an extraordinarily optimizable, low-level subset of JavaScript"

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C/C++ -> LLVM -> Emscripten -> asm.js

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int f(int i) { return i + 1; } C function f(i) { i = i|0; return (i + 1)|0; } asm.js

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But what happens when you can run C and C++ code in the browser?

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millions of lines of C compiled to asm.js/JavaScript running in a browser !

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JavaScript The future

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language, apps, ecosystem, VM

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LANGUAGE the

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ES1 1997 ES2 1998 ES3 1999 ES4 Abandoned ES5 2009 ES6 2015 ES7 est. 2016

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Adjustments based on real-world problems

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Datainn </scr <script src="../shared/vendor/bower_components/underscore/undersco <script src="../shared/vendor/bower_components/jquery/jquery.min.j <script src="../shared/vendor/bower_components/spin.js/spin.js"></ <script src="../shared/vendor/bower_components/angular/angular.js" <script src="../shared/vendor/bower_components/angular-route/angul <script src="../shared/vendor/bower_components/angular-animate/ang <script src="../shared/vendor/bower_components/ng-table/ng-table.j <script src="../shared/vendor/bower_components/moment/moment.js">< <script src="../shared/vendor/bower_components/moment/lang/nb.js"> <script src="../shared/vendor/bower_components/based-on/index.js"> <script src="../shared/vendor/bower_components/poller.js/poller.js <script src="../shared/vendor/bower_components/ee.js/ee.js"></scri <script src="../shared/vendor/bower_components/d3/d3.js"> </sc

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ECOSYSTEM the

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Cryptography API, Audio API, WebRTC, File API …

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60fps, but only one thread Web Workers 60fps, but only one thread

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from mostly huge frameworks to thousands of small libraries

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Rendering to …

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WebGL

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vimeo.com/105880197 javazone webgl

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React Native

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APPS the

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offline ﬁrst

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Full-featured online apps

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Desktop and mobile apps

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chrome os, windows 8, ﬁrefox os JavaScript as a ﬁrst-class citizen

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We will see more of the backend developers on the frontend … and that's a great thing!