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Diego Perini dperini

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dperini / ie-inject-style-rules.js
Created June 23, 2010 16:27
// this is how I fixed IE6-8 crashing on
// dynamic insertion of at-rules inside
// stylesheets (for example @font-face)
// UPDATE:
// Fix by MS, move up the style insertion
// before the stylesheet rule manipulation
function setStyle(rules) {
var d = document,
@dperini
dperini / gist:489591
Created July 25, 2010 14:13
// TODO: should probably convert result to plain array (since different engines return different things -- arrays, nodelists, objects, etc.)
var query = (function() {
var engine, engines = 'NW.Dom.select,base2.dom.querySelectorAll,Sizzle,$$,$,YAHOO.util.Selector.query,dojo.query,Ext.DomQuery.select'.split(',');
while ((engine = engines.shift())) {
if (Function('try{return ' + engine + '}catch(e){}')()) {
return Function('cssExpr, ctx', 'ctx || (ctx = document);return ' + engine + '(' +
(engine.indexOf('base2') > -1 ? 'ctx, cssExpr' : 'cssExpr, ctx') + ')');
}
}
return 'querySelectorAll' in document ?
@dperini
dperini / ie-early-clientCaps.js
Created August 3, 2010 16:36
<html>
<head>
<title>IE capabilities detection (clientCaps)</title>
<script type="text/javascript">
var r = document.documentElement, capabilities;
r.addBehavior("#default#clientCaps");
capabilities =
@dperini
dperini / readfile.js
Created May 21, 2011 10:39
/*
*
* readfile.js - Spidermonkey/V8 readfile wrapper
*
* Author: Diego Perini <diego.perini@gmail.com>
*
* Released under the Creative Commons license:
* http://creativecommons.org/licenses/by/3.0/
*
*/
@dperini
dperini / loadFT.js
Created August 23, 2011 19:28
Feature testing browser support for 'load' events
<script type="text/javascript">
// 'load' events should be supported by every browser
// this was just an exercise to find a way to test it
var isLoadSupported = 'onload' in window, loadHandler = window.onload;
document.createElement('body').setAttribute('onload', 'return');
isLoadSupported = isLoadSupported || typeof window.onload == 'function';
window.onload = loadHandler;
@dperini
dperini / has_load_capture_support.js
Created June 25, 2013 12:05
Here is an example on how to feature detect an Asynchronous event using a Synchronous event. Being able to capture 'load' events of each resource in a web page is a very interesting feature. All resources could be logged, or modified with just one 'load'' capturing event handler. This works for external link elements (CSS), for iframes, images, …
/*
*
* Feature detect support for capturing load events
*
* Author: Diego Perini
* Updated: 2013/06/25
*
* the feature test can be performed before
* both 'load' and 'DOMContentLoaded' events
*
@dperini
dperini / snippets-compression
Created May 25, 2011 22:19
Comparison between manual and automated minification/compression
Testing on code snippet at: https://gist.github.com/991057
Note: used "gzip -n9 file" on Mac to do this comparison.
Not very readable, minifier obsoleted & gzip makes size grow
****************************************************************
function(
a,
b
@dperini
dperini / scope-test.js
Created October 22, 2016 17:24
Simulate behavior of the new "Selectors Level 4" :scope selector
<!DOCTYPE html>
<html>
<head>
<title>NWMatcher Test</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script type="text/javascript" src="../../src/nwmatcher-noqsa.js"></script>
</head>
<body>
<div class="a">
<div class="a1"></div>
@dperini
dperini / block-flash-writes.txt
Created April 29, 2010 23:51
Adobe Flash LSO (Local Shared Objects) are like super-cookies that never expire and cannot be removed by browsers.
The Flash plugin installed in your system allows sites to write/share sensitive informations on your hard disk.
These are the simple info I currently have on how to make folders immutable on *NIX OS (Mac and Linux).
I have not been able to make immutable folders on my Windows XP VM maybe because I only use FAT32.
It seems that Windows allows you to lock files and folders on NTFS volumes only (I miss the info).
The following are the location of the folder that should be made immutable on each OS,
@dperini
dperini / CSS_and_Selector_parsing_differences
Last active October 28, 2017 19:13
<!DOCTYPE html>
<html lang="en">
<head><title>CSS and Selectors-API parsing differences</title>
<style>
/* these rules have a correct "selectorText" so their style declaration are applied */
a[href="#"] { background-color: red; } /* style some elements */
a:not([href="#"]) { background-color: lime; } /* style some elements */
/* these rules have a incorrect "selectorText" so their style declaration are not applied */
a:not([href="#"] { background-color: #f00; } /* doesn't style any element */