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HTML attributes are special words used inside the opening tag to control the element's behaviour. HTML attributes are a modifier of a HTML element type. An attribute either modifies the default functionality of an element type or provides functionality to certain element types unable to function correctly without them.
Event bubbling. Event bubbling is a type of DOM event propagation [1] where the event first triggers on the innermost target element, and then successively triggers on the ancestors (parents) of the target element in the same nesting hierarchy till it reaches the outermost DOM element or document object [2] (Provided the handler is initialized).
HTML sanitization. In data sanitization, HTML sanitization is the process of examining an HTML document and producing a new HTML document that preserves only whatever tags and attributes are designated "safe" and desired. HTML sanitization can be used to protect against attacks such as cross-site scripting (XSS) by sanitizing any HTML code ...
The canvas element is part of HTML5 and allows for dynamic, scriptable rendering of 2D shapes and bitmap images. It is a low level, procedural model that updates a bitmap. HTML5 Canvas also helps in making 2D games. While the HTML5 canvas offers its own 2D drawing API, it also supports the WebGL API to allow 3D rendering with OpenGL ES.
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Architecture. The wizard consists of one normal wiki page, currently located at Wikipedia:File Upload Wizard, a page of client-side Javascript code, currently at MediaWiki:FileUploadWizard.js, and a corresponding .css page, currently at MediaWiki:FileUploadWizard.css. Almost all of the text content used by the wizard (forms, prompts, warnings ...
Using CSS to hide unintentionally-created document structure is considered poor web authoring practice. This approach will transmit redundant information to the clients In some cases, this approach includes raw wikitext, which is meaningless in the context of an article (e.g. template:Infobox President )
When there is a long strip of right-positioned images or infoboxes together with a number of article sections, it usually causes the section editing links—"[edit]"—for the sections which start after the first and before the last image or infobox to bunch up to the left of it like this: [edit] [edit] [edit] (see Example 1.)