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==== Class for 2013-09-09: HTML5 elements ==== We took an entertaining (in my opinion) look through [http://jeffreyatw.com/static/frontend/series4/class16/html.zip this page containing every currently valid HTML element]. Many of them are considered "HTML5" elements, but that's just because they're relatively new. '''[http://www.youtube.com/watch?v=8-ZaoiEt2Qw Lecture video]'''<br> '''[http://jeffreyatw.com/static/frontend/series4/class16/html.zip Lecture materials]''' <!--==== Class for 2013-08-26: ClassName Swap, Language Review, RTFM, by Garrett Smith ==== ===== Lesson: CSS ClassName Swap ===== By changing an element's <code>className</code> multiple styles can be changed at one time. Using the descendant selector, and changing the <code>className</code> of an ancestor element, multiple elements can be updated simultaneously, with a modicum of highly efficient code. For Styles, replace a loop that applies styles to descendants by adding a class token to the nearest common ancestor ([http://jibbering.com/faq/notes/code-guidelines/descendant-sel.html example], [http://jibbering.com/faq/notes/code-guidelines/#design explanation]). ====== Calculating Selector's Specificity ([http://www.w3.org/TR/CSS2/cascade.html#specificity CSS 2.1]). ====== The classname swap example leverages the fact that class selectors (e.g. <code>.foo</code>) have higher specificity than element selectors (e.g. <code>tr</code>). CSS Selector specificity is determined four numbers, a-b-c-d, in a number system with a large base. <blockquote cite="http://www.w3.org/TR/CSS2/cascade.html#specificity"> count 1 if the declaration is from is a 'style' attribute rather than a rule with a selector, 0 otherwise (= a) (In HTML, values of an element's "style" attribute are style sheet rules. These rules have no selectors, so a=1, b=0, c=0, and d=0.) count the number of ID attributes in the selector (= b) count the number of other attributes and pseudo-classes in the selector (= c) count the number of element names and pseudo-elements in the selector (= d) </blockquote> ===== RTFM ===== Unschooling and autodidacticism; an Intro to [http://www.catb.org/jargon/html/R/RTFM.html RTFM], RTFFAQ, and SFTW. Understanding defines the difference between the followers, who resort to mystical incantations or convoluted DOM libraries to do the work for them, and those who can implement project requirements, as specified, with [http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&ved=0CDMQtwIwAQ&url=http%3A%2F%2Fvimeo.com%2F13702091&ei=XN8eUtSTDuaaiQfo0oGwAw&usg=AFQjCNGkkzJmJXyBpBXpyVaHkpmsN1IUcQ&sig2=Ws2-2YmQJkgYwKCd7Bfx-Q&bvm=bv.51495398,d.aGc clean code (Vimeo)]. And not downloading free scripts off dynamic drive or [ jQuery], copying, or programming by observation. When misunderstandings or debates arise, and that happens fairly often, it is important how to find the answer using STFW and RTFM, and when that fails, how (and where ([https://groups.google.com/forum/#!forum/comp.infosystems.www.authoring.html CIWAS], [https://groups.google.com/forum/#!forum/jsmentors JSMentors], [https://groups.google.com/forum/#!forum/comp.lang.javascript c.l.js], [https://groups.google.com/forum/#!forum/comp.infosystems.www.authoring.html ciwah]) to ask a [http://www.catb.org/esr/faqs/smart-questions.html smart question]. ===== JavaScript Review ===== ====== Functions ====== * [http://kangax.github.io/nfe/ FunctionExpression vs FunctionDeclaration], [https://groups.google.com/forum/#!msg/comp.lang.javascript/tjVn1NjGDN8/QgOuxtAymqoJ MemberExpression], [http://www.ecma-international.org/ecma-262/5.1/#sec-11.2.1 PropertyAccessor] and [http://jibbering.com/faq/notes/square-brackets/ Square Brackets]. ====== Specifications ====== * [http://www.ecma-international.org/publications/standards/Ecma-262-arch.htm ECMAScript 1.3] and [http://www.ecma-international.org/ecma-262/5.1/ ECMAScript 5.1] Other versions of ECMAScript, including E4X and Compact, are out of scope for this class. ====== FAQ ====== [http://jibbering.com/faq/ FAQ], also hosted on [http://www.fortybelow.ca/hosted/comp-lang-javascript/faq/ Matt's site]. -->
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