javascript page 2 - Dave's Blog


Search

FuckItJS

2012 Jun 22, 9:19

jQuery plugin that blindly removes lines with errors and recompiles until it works  

PermalinkCommentstechnical humor javascript programming coding jquery

Web Intents

2012 Jun 15, 8:05

This page is a high-level overview of the project and provides guidence on how to implement the intents in your applications without the need for the you to understand the entire spec.

PermalinkCommentstechnical programming web web-intents html javascript

Working with files in JavaScript, Part 5: Blobs

2012 Jun 5, 4:13

How to create Blobs directly and via BlobBuilder.

PermalinkCommentsblob javascript programming technical web web-browser

Line Simplification

2012 Jun 3, 12:47

Neat demo of Visvalingam’s line simplification algorithm in JavaScript applied to a map of the US.

To simplify geometry to suit the displayed resolution, various line simplification algorithms exist. While Douglas–Peucker is the most well-known, Visvalingam’s algorithm may be more effective and has a remarkably intuitive explanation: it progressively removes points with the least-perceptible change.

PermalinkCommentsline-simplification demo technical javascript

Code: Flickr Developer Blog » Parsing Exif client-side using JavaScript

2012 Jun 1, 2:51

Flickr parses the exif out of images using Web Workers, and Blob (File API)!

PermalinkCommentsjavascript blob exif image technical programming dom webworker web-browser

Working with files in JavaScript, Part 4: Object URLs

2012 Jun 1, 2:50

On the topic of blobs and createObjectURL.  Woo blobs!

PermalinkCommentsjavascript blob dom web-browser technical programming

Clippy.JS - Add Clippy and friends to any website (smore.com)

2012 May 29, 6:15

A great JS API to add Clippy or other agents to your website!  Make them talk, dance, gesture, etc

PermalinkCommentshumor microsoft js javascript web

PowerShell Equivalents for JavaScript Array Functions

2012 May 15, 3:30

Built-in

map
input | %{ expression($_) }
forEach
input | %{ [void]expression($_) }
filter
input | ?{ expression($_) }
indexOf
input.indexOf(value)

Close to built-in

some
if (input | ?{ expression($_) }) { ... }
every
if (-not input | ?{ !expression($_) }) { ... }
lastIndexOf
[array]::lastIndexOf(input, value)

Write it yourself

reduce
function reduce($fn, $a, $init) { $s = $init; $a | %{ $s = &$fn $s $_; }; $s; }
PermalinkCommentsjavascript powershell array technical

The Lazy Man's URL Parsing (joezimjs.com)

2012 May 7, 12:41

Web apps really make obvious the lack of URI APIs in the DOM or JavaScript.  This blog post goes over using DOM API side effects to resolve relative URIs and parse URIs.  An additonal benefit of this mechanism is that you avoid security issues caused by mismatched behavior between the browser’s URI parsing and your app’s URI parsing.

PermalinkCommentstechnical uri api dom browser hack url web-browser

Raising the bar on web uploads

2012 Apr 25, 5:00

Flickr’s new HTML5-ish photo upload feature technical overview.

PermalinkCommentstechnical html html5 javascript css3 css flickr file-upload

Diagramly

2012 Apr 20, 3:38

Web app for making diagrams like Visio.  Export your results as SVG, PNG, PDF and others.

PermalinkCommentstechnical diagram web-app javascript web visio svg

JavaScript in JavaScript (js.js): smaller, faster, and with demos (princeton.edu)

2012 Apr 19, 3:36

Unlike Inception, running a JS engine in a JS engine does not make the inner JS engine go faster.

PermalinkCommentstechnical javascript programming interpretter

Image Error Level Analysis with HTML5

2012 Apr 16, 1:59

Javascript tool says if a photo is shopped. It can tell by looking at the pixels. Seriously. Links to cool presentation on the theory behind the algorithm behind the tool: http://www.wired.com/images_blogs/threatlevel/files/bh-usa-07-krawetz.pdf

PermalinkCommentstechnical javascript jpeg photoshop

Hotel Wifi JavaScript Injection (justinsomnia.org)

2012 Apr 5, 3:23

In short, Marriott is injecting JavaScript into the HTML of every webpage its hotel customers view for the purpose of injecting ads (and in the meantime, breaking YouTube).

PermalinkCommentstechnical css html security web internet javascript injection

How to collect JavaScript performance data for Windows Metro apps on a device that does not have Visual Studio installed

2012 Mar 16, 2:27

Documentation for the VS JS profiler for Win8 HTML Metro Apps on profiling apps running on remote machines. 

PermalinkCommentswin8 programming technical js vs

Dave Weston on security best practices in Win8 HTML Metro Apps.

2012 Mar 14, 9:29PermalinkCommentssecurity technical video david-weston wwa win8 programming html javascript

Cursor:none abuse (trick users into clicking Facebook 'like') (co.uk)

2012 Mar 6, 7:19

Cursor spoofing. Great job!

PermalinkCommentstechnical javascript css html cursor security

paulftompkins: shahruz: Promo on IFC for the upcoming Comedy...

2012 Feb 29, 10:13
[Flash 10 is required to watch video.]

paulftompkins:

shahruz:

Promo on IFC for the upcoming Comedy Bang Bang TV show!!!

BE EXCITED.

I am excited Paul.

PermalinkCommentshumor video comedy-bang-bang

Client Side Cross Domain Data YQL Hack

2012 Feb 27, 2:28

One of the more limiting issues of writing client side script in the browser is the same origin limitations of XMLHttpRequest. The latest version of all browsers support a subset of CORS to allow servers to opt-in particular resources for cross-domain access. Since IE8 there's XDomainRequest and in all other browsers (including IE10) there's XHR L2's cross-origin request features. But the vast majority of resources out on the web do not opt-in using CORS headers and so client side only web apps like a podcast player or a feed reader aren't doable.

One hack-y way around this I've found is to use YQL as a CORS proxy. YQL applies the CORS header to all its responses and among its features it allows a caller to request an arbitrary XML, HTML, or JSON resource. So my network helper script first attempts to access a URI directly using XDomainRequest if that exists and XMLHttpRequest otherwise. If that fails it then tries to use XDR or XHR to access the URI via YQL. I wrap my URIs in the following manner, where type is either "html", "xml", or "json":

        yqlRequest = function(uri, method, type, onComplete, onError) {
var yqlUri = "http://query.yahooapis.com/v1/public/yql?q=" +
encodeURIComponent("SELECT * FROM " + type + ' where url="' + encodeURIComponent(uri) + '"');

if (type == "html") {
yqlUri += encodeURIComponent(" and xpath='/*'");
}
else if (type == "json") {
yqlUri += "&callback=&format=json";
}
...

This also means I can get JSON data itself without having to go through JSONP.
PermalinkCommentsxhr javascript yql client-side technical yahoo xdr cors

Learn from Haskell - Functional, Reusable JavaScript (github.com)

2012 Feb 21, 3:32PermalinkCommentstechnical programming functional haskell javascript
Older EntriesNewer Entries Creative Commons License Some rights reserved.