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Replacing H1 text with a logo image: best method for SEO and accessibility?
...propriate for, well, just that: headings and subheadings for content.
In HTML5, more than one heading is allowed per page, but a logo isn't deserving of one of them. Your logo, which might be a fuzzy green widget and some text is in an image off to the side of the header for a reason - it's sort o...
Best Practice: Access form elements by HTML id or name attribute?
...provided "foo" is valid as a javascript property name. (It might not be - HTML5 places almost no restrictions on the value of the name attribute, so e.g. you can have <select name="a+b"> or <input type="text" name="...2">, which can't be referenced using javascript .propertyName notatio...
What is the difference between required and ng-required?
... It doesn't, really. Not sure, but I think what you're referring to is html5 validation, which is preformed automatically by most modern browsers. If you want to take control over this (disabling what the browser does) you can add the attribute novalidate: <form method="post" action="/foo" no...
Going from a framework to no-framework [closed]
...cier than basic templating and header-setting is required for new HTTP and HTML5 features:
HTTP Strict Transport Security (Helps protect against WiFi exploits.)
X-Frame-Options (Restrict embedding of your pages. Good against phishing.)
HTML5 IFrame Sandbox Attribute (Sandbox 3rd-party ads/badges/v...
Drawing an image from a data URL to a canvas
...e:
var img = new Image;
img.src = strDataURI;
The drawImage() method of HTML5 Canvas Context lets you copy all or a portion of an image (or canvas, or video) onto a canvas.
You might use it like so:
var myCanvas = document.getElementById('my_canvas_id');
var ctx = myCanvas.getContext('2d');
var...
UTF-8 all the way through
...L (XHTML, HTML4, etc.), these points may still be useful:
For HTML before HTML5 only: you want all data sent to you by browsers to be in UTF-8. Unfortunately, if you go by the only way to reliably do this is add the accept-charset attribute to all your <form> tags: <form ... accept-charse...
Highlight a word with jQuery
...pported by every major browser since the very early 2000's, and is part of HTML5 (as early as 2008): w3.org/TR/2008/WD-html5-20080610/dom.html#innerhtml It's still present in the latest revision at w3.org/TR/DOM-Parsing. See also w3.org/TR/html5/references.html#refsDOMPARSING
–...
How to differ sessions in browser-tabs?
...
You can use HTML5 SessionStorage (window.sessionStorage). You will generate a random id and save in session Storage per Browser Tab.
Then each browser tab has his own Id.
Data stored using sessionStorage do not persist across browse...
Html code as IFRAME source rather than a URL
...dy.innerHTML = 'Hello world';
Example
Edit 2 (December 2017): use the Html5's srcdoc attribute, just like in Saurabh Chandra Patel's answer, who now should be the accepted answer! If you can detect IE/Edge efficiently, a tip is to use srcdoc-polyfill library only for them and the "pure" srcdoc ...
Open Graph namespace declaration: HTML with XMLNS or head prefix?
...ng prefix as given by http://www.w3.org/TR/rdfa-in-html/#extensions-to-the-html5-syntax
However, this requires adhering to http://dev.w3.org/html5/rdfa/rdfa-module.html
Also, the tool support for rel="profile" as mentioned therein is as yet awaited. Till then, the choice is between using older docty...