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Dead Centre
The cyan box 'horizon' is positioned absolutely 50% from the top of the page, is 100% wide and has a nominal height of 1px. Its overflow is set to 'visible'. The red 'content' box is nested inside the 'horizon' box and is 250px wide, 70px high and is positioned absolutely 50% from the left - but has a negative margin that is exactly half of its width, -125px.
CSS JSON
Extending CSS with CSS JSON Custom selector property/values can be used in CSS JSON as a mechanism to extend CSS. CSS text pre-processing is possible through the mapping of a specfied property to a conditionally executed parsing routine.REC-CSS2-19980512 This specification defines Cascading Style Sheets, level 2 (CSS2). CSS2 is a style sheet language that allows authors and users to attach style (e.g., fonts, spacing, and aural cues) to structured documents (e.g., HTML documents and XML applications). By separating the presentation style of documents from the content of documents, CSS2 simplifies Web authoring and site maintenance.
Cascading Style Sheets, Level 2
This specification has been written with two types of readers in mind: CSS authors and CSS implementors. We hope the specification will provide authors with the tools they need to write efficient, attractive, and accessible documents, without overexposing them to CSS's implementation details. Implementors, however, should find all they need to build conforming user agents . The specification begins with a general presentation of CSS and becomes more and more technical and specific towards the end. For quick access to information, a general table of contents, specific tables of contents at the beginning of each section, and an index provide easy navigation, in both the electronic and printed versions.
About the CSS2 Specification
Horizontal Rules and CSS.::. Blakems.com
The other day my fellow co-worker, Cameron , and I were discussing what the best way to style the hr tag? I usually try to use a div if I just need a line for presentation. But what if I need to style an hr that is used on an existing site.
CSS Tutorials - Understanding Multiple Element Formatting Rules
Part: 1 2 3 4 5 6 7 A collection of 15 FAQs/tutorials tips on understanding multiple element formatting rules. Clear answers are provided with tutorial exercises on stacking and nesting block elements, aligning in-line elements, floating block elements, collapsing margins between elements, balancing widths and heights with parent elements, collapsing white spaces. Topics included in this collection are:Centering elements on a CSS website
To horizontally center an element (block, tag or a whole website) using CSS, you only need to specify a width to the element and automatic width to lateral margins.
Apart from Floats 1 , the CSS Specificity is one of the most difficult concepts to grasp in Cascading Stylesheets. The different weight of selectors is usually the reason why your CSS-rules don’t apply to some elements, although you think they should have. In order to minimize the time for bug hunting you need to understand, how browsers interpret your code. And to understand that, you need to have a firm understanding on how specificity works . In most cases such problems are caused by the simple fact that somewhere among your CSS-rules you’ve defined a more specific selector.
CSS Specificity: Things You Should Know | CSS | Smashing Magazin
The concept of floats is probably one of the most unintuitive concepts in CSS. Floats are often misunderstood and blamed for floating all the context around it, causing readability and usability problems. However, the reason for these problems isn’t the theory itself, but the way the theory is interpreted – by developers and browsers. Still, if you take a closer look at the float theory, you’ll find out out that it isn’t that complex as it appears to be. Most related problems are caused by the older versions of (take a guess) Internet Explorer. If you know the bugs, you can control the way information is presented in a more sophisticated, profound way.
CSS Float Theory: Things You Should Know | CSS | Smashing Magazi
Powerful CSS-Techniques For Effective Coding | CSS | Smashing Ma
Sometimes being a web-developer is just damn hard. Particularly coding is often responsible for slowing down our workflow, reducing the quality of our work and sleepless nights with pizza and coffee laying around the laptop. Reason: with a number of incompatibility issues and quite creative rendering engines it sometimes takes too much time to find a workaround for some problem without addressing browsers with quirky hacks. And that’s where ready-to-use solutions developed by other designers come in handy. One year ago we’ve published the post with 53 CSS-Techniques You Couldn’t Live Without 1 where we provided references to the most useful CSS-techniques which are often used in almost every project. Over the last year we’ve been observing what’s happening with the CSS-based web-development, and we collected most useful CSS-techniques we’ve stumbled upon — for us and for our readers.