cvializ’s gists

cvializ / index.html

Created July 29, 2019 19:42

Date.now vs Date.prototype.getTime (https://jsbench.github.io/#5fd7ea6a54047e726093e9c69f27d140) #jsbench #jsperf

	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8"/>
	<title>Date.now vs Date.prototype.getTime</title>
	<script src="https://cdnjs.cloudflare.com/ajax/libs/benchmark/1.0.0/benchmark.min.js"></script>
	<script src="./suite.js"></script>
	</head>
	<body>
	<h1>Open the console to view the results</h1>

cvializ / index.html

Last active November 16, 2018 16:42 — forked from jridgewell/index.html

Iterating over collections of elements (https://jsbench.github.io/#f638cacc866a1b2d6e517e6cfa900d6b) #jsbench #jsperf

	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8"/>
	<title>Iterating over collections of elements</title>
	<script src="https://cdnjs.cloudflare.com/ajax/libs/benchmark/1.0.0/benchmark.min.js"></script>
	<script src="./suite.js"></script>
	</head>
	<body>
	<h1>Open the console to view the results</h1>

cvializ / index.html

Last active August 10, 2018 14:07

Iterating with Dates #jsbench #jsperf (http://jsbench.github.io/#e104ebb4a49cb1b1c19237c9add27d1c) #jsbench #jsperf

	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8"/>
	<title>Iterating with Dates #jsbench #jsperf</title>
	<script src="https://cdnjs.cloudflare.com/ajax/libs/benchmark/1.0.0/benchmark.min.js"></script>
	<script src="./suite.js"></script>
	</head>
	<body>
	<h1>Open the console to view the results</h1>

cvializ / index.html

Last active April 5, 2018 19:13

Mapping over collections of elements (http://jsbench.github.io/#1f0f0ac3a7c49d483a1009d3473788fe) #jsbench #jsperf

	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8"/>
	<title>Mapping over collections of elements</title>
	<script src="https://cdnjs.cloudflare.com/ajax/libs/benchmark/1.0.0/benchmark.min.js"></script>
	<script src="./suite.js"></script>
	</head>
	<body>
	<h1>Open the console to view the results</h1>

cvializ / content-script.js

Created May 12, 2016 00:32

Check the DOM for background-image URLs and replace them with data-URIs

	function withMutations(records) {
	records.forEach(function (record) {
	var target = record.target;
	if (extensionContains(target)) {
	var children = target.querySelectorAll('*');
	Array.prototype.forEach.call(children, fixBackgroundImage);
	}
	});
	}

cvializ / content-script.js

Created May 12, 2016 00:18

Reload an img tag's image data through an extension's background page.

	function onExtensionImgError(e) {
	var img = e.target;
	var tagName = img.tagName.toLowerCase();
	var wasReattempted = img.dataset.myExtensionReattempted;
	var reattempt = (!wasReattempted && tagName === 'img' && isHttpUrl(img.src) && extensionContains(img));
	if (reattempt) {
	img.dataset.myExtensionReattempted = true;
	api.port.emit('load_image', img.src, function onRespond(data) {
	var err = data.error;
	if (!err) {

cvializ / content-script.js

Created May 12, 2016 00:13

Check the DOM for images that need to be loaded from the background page

	function onCspCheckLoaded(isCspBlocking) {
	extension_module.csp = isCspBlocking; // cache the check value
	if (isCspBlocking) {
	// Capture error events triggered by img tags
	document.addEventListener('error', onExtensionImgError, true);
	// Check for background images
	var observer = new MutationObserver(withMutations);
	var whatToObserve = { childList: true, subtree: true };
	observer.observe(document, whatToObserve);
	}

cvializ / content-script.js

Created May 11, 2016 23:55

A function that checks for a Content Security Policy

	/* ... */
	// Loads an image on the host page to check for a CSP
	function loadCspCheck(cb) {
	var CSP_CHECK_URL = '//d34db33f.cloudfront.net/assets/tiny.png';
	var cspCheckImage = new Image();
	cspCheckImage.addEventListener('load', cb.bind(null, false));
	cspCheckImage.addEventListener('error', cb.bind(null, true));
	cspCheckImage.src = CSP_CHECK_URL;
	}
	/* ... */

cvializ / background.js

Created May 11, 2016 23:31

Loading images from the background page of a browser extension.

	/* A map of functions listening for messages from the content scripts */
	var listeners = {
	/* ... */
	load_image: function (path, respond, tab) {
	// The Firefox worker XHR dislikes protocol-less URLs, so prefix with the tab's protocol.
	path = (path.indexOf('//') === 0 ? tab.url.slice(0, tab.url.indexOf(':') + 1) + path : path);
	var imageType = path.slice(path.lastIndexOf('.') + 1);
	var xhr = new XMLHttpRequest();
	xhr.open('GET', path, true);
	xhr.responseType = 'arraybuffer';

cvializ / random_wikipedia_urls.sh

Created January 22, 2016 20:47

Grab a list of random Wikipedia URLs from the command line

	for i in $(seq 1 20); do
	curl -sIL http://en.wikipedia.org/wiki/Special:Random \| perl -n -e '/^Location: (.*)$/ && print "$1\n"' \| tail -n 1
	done

Carlos Vializ cvializ