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CSS Introduction |
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CSS Syntax |
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Specify CSS |
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The CSS Type Selector |
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The CSS Descendant Selector |
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The CSS Child Selector |
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The CSS Class Selector |
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The CSS Id Selector |
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The CSS Element selector |
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CSS Pseudo Class Selectors |
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CSS Pseudo Elements Selectors |
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Other special CSS selectors |
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How to Group CSS Selectors |
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Summery of CSS Selectors |
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Sort out CSS Style for elements |
| CSS Reference | |
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Text types
Table types
Print types
Positioning types
Padding types
Outline types
Margin types
List types
Generated Content
Font types
Dimension types
CSS Pseudo types
Border types
Background types
Aural types
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The CSS reference
"font-size" - css property (v. css 1)
- To specify the font size of a text.
- Initial value: medium
- The property is inherited
- HTML usage: all elements
-
Browsers that support the font-size - property :
Possible font-size values:
| value | Comments | CSS |
|---|---|---|
| absolute-size | A keyword representing an index to a
table of font sizes computed and kept by the UA. Possible values are: xx-small | x-small | small | medium | large | x-large | xx-large |
1 |
| relative-size | A keyword is interpreted relative to the table
of font sizes and the font size of the parent element.
Possible values are: larger | smaller |
1 |
| length | With this you specify a positive value (it cannot be negative) for the size followed with a unit identifier. | 1 |
| percentage | With this you specify a positive value (it cannot be negative) with a percentage. Refer to parent element's font size . | 1 |
| inherit | Will inherit the value from parent specification. This property value is new with CSS 2. | 2 |
Possible unit identifier:
| unit identifier | Comments | CSS |
|---|---|---|
| em | The relative unit 'em' is relative to the font size of the element itself. | 1 |
| ex | The relative unit 'ex' is relative to the font size of the element itself. | 1 |
| px | Pixels, relative to the viewing device | 1 |
| in | inches -> 1 inch is equal to 2.54 centimeters. | 1 |
| cm | centimeters. | 1 |
| mm | millimeters. | 1 |
| pt | points -> the points used by CSS2 are equal to 1/72th of an inch. | 1 |
| pc | picas -> 1 pica is equal to 12 points. | 1 |
Property "font-size" example:
<!DOCTYPE HTML >
<html >
<head>
<title>Test</title>
<style type="text/css">
div {border: blue 1px solid; color:black;
padding: 4px 4px 4px 4px; width: 400px;
}
.absolute { font-size: x-large; }
.relative { font-size: larger; }
.length { font-size: 24px; }
.percentage { font-size: 140%; }
</style>
</head>
<body style="font-size: 14px;" >
<br>Starting with 14px
<br>absolute-> font-size: x-large; <br>
<div class="absolute" >
A keyword representing an index to a
table of font sizes computed and kept by the UA.
</div>
<br>relative-> font-size: larger;<br>
<div class="relative" >
A keyword is interpreted relative to the table
of font sizes and the font size of the parent element.
</div>
<br>font-size: 24px;<br>
<div class="length" >
With this you specify a positive value for
the size followed with a unit identifier.
</div>
<br>font-size: 140%;<br>
<div class="percentage" >
With this you specify a positive value with
a percentage. It is related to the present font.
</div>
</body>
</html>Javascript access:
// To SET values ([o] is the target object)
[o].style.fontSize="font-size values"
// To GET values you must first get the computed style object
// To get that object in IE or Opera:
var cStyle=[o].currentStyle;
// To get that object in Firefox, Chrome or Safari (w3c-type):
var cStyle=window.getComputedStyle([o],null)
// To GET the property value:
var value=cStyle.fontSize;
// IE and Opera will return a value in units as used with a Set.
// Firefox will return a calculated float value in pixel (px).
// Chrome or Safari will return a calculated int value in pixel (px).
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