<< Chapter < Page Chapter >> Page >

Css box model

W3C box model
The W3C standard box model

How to position elements

(External Link)

The default is that elements are positioned static . This means that the element is not positioned in special way. It is in the normal flow of elements.

Use of relative position.


A validator checks if a CSS file contains no erroneous CSS selectors and rules. W3C validator

Css 3

CSS3 (CSS level 3) builds on CSS level 2. Unlike CSS2 which is a single specification document CSS3 is devided into several separate recommendations documents. They are called "modules". See table of specifications of the W3C.

News about the implementation of the new features css3.info . Web site which tests CSS3 implementation in browsers.

Interactive construction of CSS3 code (e.g. rounded corners, shadow, etc) css3please.com



There is an add-on called Firebug to the Firefox web browser which helps to debug CSS style sheets. It helps as well to learn about CSS (External Link) .

InternetExplorer 8, 9 and 10 give access to developer tools (Manual) through the F12 key.

Css versus xsl

Why does W3C recommend two different style languages? Which one should you use? Basically, the rule can be summarized very succinctly: Use CSS when you can, use XSL when you must. (External Link)

Css in mobile devices

CSS mobile (current status) aims at describing a subset of CSS useful for mobile devices.

Media queries

CSS media queries (W3C spec) allow that style rules are only applied to specific output media, i.e. screen, print, handheld or other. They can as well depend on conditions like display width. The following example demonstrates the idea

@media (max-width: 320px) { /* rules for mobile devices go here */} @media (min-width: 321px) {/* rules for devices with larger screens go here */ }

More about media queries; collection of example sites

Use of media queries to implement a responsive navigation, i.e. a navigation which works on desktop or laptop computers where there is a cursor and on touch devices (mobile phones, tablets).


A CSS framework is one or more CSS files which include style declarations on which you can build by either extending or replacing them. The aim is that you do can rely on ready-made designs and do not need to create workarounds for the browser inconsistencies.

Skeleton : Responsive boilerplate

Bootstrap Bootstrap is a popular HTML, CSS, and JS framework for developing responsive projects.

(External Link) -- a set of small, responsive CSS modules; see also (External Link) (Scalable and Modular Architecture for CSS).

Web fonts

Current browsers may load fonts front the web ( @font-face property) and thus support the font part of CSS 3 .

Google font service

Google provides a service from which you can choose free fonts. It generates some code which you can add to your website. They as well provide a font API and host a repository with free fonts. So you might add the Gentium font by adding an import rule at the beginning of your style sheet

@import url(http://fonts.googleapis.com/css?family=Gentium+Basic&subset=latin,latin-ext);

But you may as well copy a free font to a directory of your own website and serve it from there. For an example of loading a font see below. Gentium is a free font under the Open Font License (OFL).

@font-face { font-family: Gentium;src: url(http://yoursite/fonts/Gentium.ttf); }p { font-family: Gentium, serif; }

Xhtml plus css to pdf

Further reading

Useful coding techniques

W3C CSS Test Harness

Questions & Answers

find the 15th term of the geometric sequince whose first is 18 and last term of 387
Jerwin Reply
The given of f(x=x-2. then what is the value of this f(3) 5f(x+1)
virgelyn Reply
hmm well what is the answer
how do they get the third part x = (32)5/4
kinnecy Reply
can someone help me with some logarithmic and exponential equations.
Jeffrey Reply
sure. what is your question?
okay, so you have 6 raised to the power of 2. what is that part of your answer
I don't understand what the A with approx sign and the boxed x mean
it think it's written 20/(X-6)^2 so it's 20 divided by X-6 squared
I'm not sure why it wrote it the other way
I got X =-6
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x-6
oops. ignore that.
so you not have an equal sign anywhere in the original equation?
is it a question of log
Commplementary angles
Idrissa Reply
im all ears I need to learn
right! what he said ⤴⤴⤴
what is a good calculator for all algebra; would a Casio fx 260 work with all algebra equations? please name the cheapest, thanks.
Kevin Reply
a perfect square v²+2v+_
Dearan Reply
kkk nice
Abdirahman Reply
algebra 2 Inequalities:If equation 2 = 0 it is an open set?
Kim Reply
or infinite solutions?
The answer is neither. The function, 2 = 0 cannot exist. Hence, the function is undefined.
Embra Reply
if |A| not equal to 0 and order of A is n prove that adj (adj A = |A|
Nancy Reply
rolling four fair dice and getting an even number an all four dice
ramon Reply
Kristine 2*2*2=8
Bridget Reply
Differences Between Laspeyres and Paasche Indices
Emedobi Reply
No. 7x -4y is simplified from 4x + (3y + 3x) -7y
Mary Reply
how do you translate this in Algebraic Expressions
linda Reply
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
Crystal Reply
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
Chris Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
many many of nanotubes
what is the k.e before it land
what is the function of carbon nanotubes?
I'm interested in nanotube
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
what is system testing
what is the application of nanotechnology?
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
anybody can imagine what will be happen after 100 years from now in nano tech world
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
silver nanoparticles could handle the job?
not now but maybe in future only AgNP maybe any other nanomaterials
I'm interested in Nanotube
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
the Beer law works very well for dilute solutions but fails for very high concentrations. why?
bamidele Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
Privacy Information Security Software Version 1.1a
Got questions? Join the online conversation and get instant answers!
QuizOver.com Reply

Get the best Algebra and trigonometry course in your pocket!

Source:  OpenStax, Test collection revision. OpenStax CNX. May 02, 2012 Download for free at https://legacy.cnx.org/content/col11421/1.1
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Test collection revision' conversation and receive update notifications?