java scriptgettingstarted

JavaScriptGetting started

Wolfram Kriesing, uxebuCo-Founder

@wolframkriesing

Mittwoch, 18. Mai 2011

Wolfram KriesingCo-Founder

@wolframkriesing


We open the mobile web.


JavaScript• It's a real programming language!

• Brendan Eich at Netscape invented it

• Web only language - never was

• Often not learned, just used

• ECMAScript5, ECMAScript.next


Take a guess!

What is JavaScript?


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Easy, right!?


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So...What is JavaScript?


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4

2

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YES

YES

YES

YES

YES


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prompt("Type something here, please!")


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https://github.com/wolframkriesing/demo-orientation

Hack it!


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Impact is a JavaScript Game Engine

http://impactjs.com/

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•100% HTML5•WebGL•JavaScript•8 Chromes•WebSockets•node.js with socket.io

http://webglsamples.googlecode.com


http://webglsamples.googlecode.com/

http://webglsamples.googlecode.com/

MicrolibrariesThe new trend!?


"JavaScript is broken. It can be fixed with more JavaScript"


var o = new Object();

vs.

var o = {};


var s = new String();

vs.

var s = "";


var x = "" + y;x.toLowerCase();


"By reducing your global footprint to a single name, you significantly reduce the chance of bad interactions with other applications, widgets, or

libraries."

Douglas Crockford


;(function(){})()


var node = byId("someEl");node._value = 42;


var str = s1 + s2 + s3;

vs.

var str = [s1, s2, s3].join("");


var C = function(name){ this.name = name;};

C.prototype.say = function(){ console.log(this.name);};

var obj = new C("Dave");


Libraries


Why?• DOM API sucks

• Event handling differs

• Ajax API sucked

• Memory leaks

• before HTML5 - no UI

• Animations maybe complex


Wolfram Kriesinguxebu.com

Thank you


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