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Setting or clearing ("unclicking") a checkbox changes the checkbox's state with no other side-effects.Violating this guideline by associating additional actions with the change of state frequently confuses users, because they are used to configuring data in entry controls such as text boxes, radio buttons, and checkboxes and then invoking an action control such as a push button to initiate the ...
Bootstrap 3 features new plugin system with namespaced events. Bootstrap 3 dropped Internet Explorer 7 and Firefox 3.6 support, but there is an optional polyfill for these browsers. [13] Bootstrap 3 was also the first version released under the twbs organization on GitHub instead of the Twitter one. [14]
On 28 October 2014, HTML5 was released as a W3C Recommendation, [32] bringing the specification process to completion. [5] On 1 November 2016, HTML 5.1 was released as a W3C Recommendation. [33] On 14 December 2017, HTML 5.2 was released as a W3C Recommendation. [34]
HTML5 Boilerplate is an HTML, CSS and JavaScript template (or boilerplate) for creating HTML5 websites with cross-browser compatibility. References External links ...
The Markup Validation Service is a validator by the World Wide Web Consortium (W3C) that allows Internet users to check pre-HTML5 HTML and XHTML documents for well-formed markup against a document type definition (DTD). Markup validation is an important step towards ensuring the technical quality of web pages.
W3Schools is a freemium educational website for learning coding online. [1] [2] Initially released in 1998, it derives its name from the World Wide Web but is not affiliated with the W3 Consortium. [3] [4] [unreliable source] W3Schools offers courses covering many aspects of web development. [5] W3Schools also publishes free HTML templates.
W3C began development of its own Arena browser as a test bed for HTML 3 and Cascading Style Sheets, [46] [47] [48] but HTML 3.0 did not succeed for several reasons. The draft was considered very large at 150 pages and the pace of browser development, as well as the number of interested parties, had outstripped the resources of the IETF. [ 14 ]
Where element names the HTML element type, and attribute is the name of the attribute, set to the provided value. The value may be enclosed in single or double quotes, although values consisting of certain characters can be left unquoted in HTML (but not XHTML). [2] [3] Leaving attribute values unquoted is considered unsafe. [4]