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Cascade Style Sheets (CSS)
== Cascade Style Sheets (CSS) ==


A CSS is made up of two parts: the selector and declaration. The selector states which tag the rule applies. The declaration stats what happens when the rule is applied.
A CSS is made up of two parts: the selector and declaration. The selector states which tag the rule applies. The declaration stats what happens when the rule is applied.
Line 17: Line 17:
h3 {font-style:italic;}</pre>
h3 {font-style:italic;}</pre>


== Contextual Selectors ==
== Selectors ==
Contextual selectors use more than one tag in the selector. The tag closest to the declaration is the targeted tag. The additional tag(s) state where the target tag must be located in the markup up in order for target tag to be affected. Contextual selectors have spaces between them.


=== Contextual selector examples ===
[[Selectors]]
<pre><html>
<head>
<title>Contextual Selector Example 1</title>
<link href="style_sheets/contextual_selector_example_1.css" rel="stylesheet" type="text/css">
</head>
<body>
</pre>


=== Contextual Class Selectors ===
== Adding Styles to Web pages ==


You can combine tag and class name to make a selector more specific.
[[Adding Styles to Web pages]]


The second line states '''any tags with "specialtext" class will be bold'''.
== Psuedo Elements and Classes ==


The third line states '''"specialtext" class must be within the context of p tag for rule to apply'''.
[[Psuedo Elements and Classes]]


<pre>
== Cascade and Rule Declarations ==
p { font-family: Helvetica, sans-serif; }
.specialtext { font-weight:bold; }
p.specialtext { color:red}
</pre>


[http://www.gotopinion.info/styles/class_selector_example_0.html | Class Selector Example 0]
[[Cascade and Rule Declarations]]


You can further specify by adding more tags.
== Styling Fonts and Text ==


The fourth line states '''span tag within a paragraph with "specialtext" class will be italicized'''
[[Styling Fonts and Text]]


<pre>
== Positioning Elements aka ''The Box'' ==
p { font-family: Helvetica, sans-serif; }
.specialtext { font-weight:bold; }
p.specialtext { color:red}
p.specialtext span { font-style:italic; }
</pre>


[http://www.gotopinion.info/styles/class_selector_example_1.html | Class Selector Example 1]
[[Positioning Elements]]


=== Skipping the restrictions of hierarchy ===
== Basic Page Layout ==
The line states '''span tag can be a descendant of any tag with specialtext class'''
 
<pre>.specialtext span { color:blue; }
[[Basic Page Layout]]
</pre>
 
== Tips creating styles ==
 
To eliminate the difference between user agents always zero out margins and padding on all elements.
 
Example:
<pre>* {margin:0; padding:0;}</pre>
 
== Helpful links ==
 
[http://www.w3.org/Style/CSS/ Cascading Style Sheets home page]
 
[http://www.w3.org/Style/CSS/current-work Cascading Style Sheets Current Work]
 
[http://www.w3.org/TR/CSS21/ Cascading Style Sheets Level 2 Revision 1 (CSS 2.1) Specification]
 
[http://www.w3.org/TR/REC-CSS2/ Cascading Style Sheets, level 2 CSS2 Specification]
 
[http://www.w3.org/TR/REC-CSS1 Cascading Style Sheets, level 1 CSS1 Specification]
 
[http://www.cssmenumaker.com/ CSS Menu Maker]
 
== Interesting CSS resources ==
 
[https://svgontheweb.com/ SVG on the Web] A Practical Guide
 
[https://web-design-weekly.com/2014/11/18/viewport-units-vw-vh-vmin-vmax/ Viewport Units vm vh vmin vmax]
 
[https://medium.com/@aniboaz/animate-svg-4fa7dd00e860 Animate SVGs with CSS] blog led me to [https://jonsuh.com/blog/animate-svg-with-css/ Animate SVG with CSS]




<center>[[web development|Back to Web Development]]</center>
<center>[[web development|Back to Web Development]]</center>

Latest revision as of 20:54, 22 September 2018

Cascade Style Sheets (CSS)[edit | edit source]

A CSS is made up of two parts: the selector and declaration. The selector states which tag the rule applies. The declaration stats what happens when the rule is applied.

The declaration is made up of two elements: a property and value. A declaration must end with a semicolon.

Multiple declarations can be contained in a single rule.

Multiple selectors can be contained in a single rule. A comma must be used after each selector except the last. 

h1, h2, h3 {color:red; font-weight:bold;}

Multiple rules can be applied to the same selector. 

h1, h2, h3 {color:red; font-weight:bold;}

h3 {font-style:italic;}

Selectors[edit | edit source]

Selectors

Adding Styles to Web pages[edit | edit source]

Adding Styles to Web pages

Psuedo Elements and Classes[edit | edit source]

Psuedo Elements and Classes

Cascade and Rule Declarations[edit | edit source]

Cascade and Rule Declarations

Styling Fonts and Text[edit | edit source]

Styling Fonts and Text

Positioning Elements aka The Box[edit | edit source]

Positioning Elements

Basic Page Layout[edit | edit source]

Basic Page Layout

Tips creating styles[edit | edit source]

To eliminate the difference between user agents always zero out margins and padding on all elements.

Example: 

* {margin:0; padding:0;}

Helpful links[edit | edit source]

Cascading Style Sheets home page

Cascading Style Sheets Current Work

Cascading Style Sheets Level 2 Revision 1 (CSS 2.1) Specification

Cascading Style Sheets, level 2 CSS2 Specification

Cascading Style Sheets, level 1 CSS1 Specification

CSS Menu Maker

Interesting CSS resources[edit | edit source]

SVG on the Web A Practical Guide

Viewport Units vm vh vmin vmax

Animate SVGs with CSS blog led me to Animate SVG with CSS


Back to Web Development
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