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Overview
Through summaries of key concepts and CSS examples, this article aims to describe how you can override FSS styles and classes with your own CSS styles.
More technical details and background information regarding the CSS concepts are provided at the W3C.
Key Concepts
The following are HTML and CSS concepts that you may find helpful to have knowledge of before proceeding to learn how to override FSS styles.
Inheritance
The structure of HTML is hierarchical and can be compared to a tree structure, where one element, or HTML tag (eg. <body>, <p>) has the following characteristics:
- It can contain several "child" elements
- It belongs to only one "parent" element
- It can have several "ancestor" elements (parents of its parent element)
- It can have several "descendent" elements (children of its child elements)
CSS can support such a structure by allowing child elements to inherit certain properties of their parents when specified.
Example:
body { font-family: "Times New Roman"; font-size: 0.9em; }
p { font-family: inherit; font-size: 1.2em; }
div { font-family: "Arial"; font-size: inherit; }
asdf
<html>
<head>
<link rel="stylesheet" href="style.css" type="text/css">
<title>Inheritance Example</title>
</head>
<body>
<p>This is a paragraph inside the body tag, so it is a child of the body element.</p>
<p>This is another child paragraph inside body.</p>
<div>This is another child inside body, but separate from the paragraphs.
<p>This is a paragraph inside the div tag, so it is a child of the div element.</p>
<p>This is another child paragraph inside div.</p>
</div>
</body>
</html>
asdf
Style sheet origins
One thing to keep in mind when designing style sheets for your website is that site visitors can load their own style sheets to change the look and feel of your design
Author
User
User Agent
!importance declaration
Summarize concept and include examples
Specificity
Summarize concept and include examples
Order of overrides
Summarize concept and include examples
How to Override FSS Styles
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Overriding an Entire Class
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Overriding an Instance of a Class
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