Java scriptgettingstarted

JavaScript
Getting started

Wolfram Kriesing, uxebu
Co-Founder

@wolframkriesing

Mittwoch, 18. Mai 2011

Wolfram Kriesing
Co-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?


Easy, right!?


So...
What is JavaScript?


0 YES

1 YES

2 YES

3 YES

4 YES


0

prompt("Type something here, please!")


1

Hack it!

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


2

3

Impact is a JavaScript Game Engine

http://impactjs.com/


4

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

http://webglsamples.googlecode.com

Microlibraries
The 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


Thank you

Wolfram Kriesing
uxebu.com


Java scriptgettingstarted

Weitere ähnliche Inhalte

Ähnlich wie Java scriptgettingstarted (11)

Mehr von wolframkriesing (20)

Java scriptgettingstarted