The CSS reference
"height" - css property (v. css 1)
- This property specifies the content height of boxes generated by block-level, inline-block and replaced elements.
- Replaced element is content which is outside the scope of the CSS formatting model, such as an image, embedded document, or applet.
- This property does not apply to non-replaced inline-level elements.
- Initial value: auto
- The property is not inherited
- HTML usage: All elements but non-replaced inline elements, table columns, and column groups
-
Browsers that support the height - property :
How width, height, margin, border and padding properties relates to each other:
• 'margin-top'
• 'margin-bottom'
• 'margin-left'
'margin-right'
•
• 'border-top-width'
• 'border-bottom-width'
• 'border-left-width'
'border-right-width'
•
-
The total element width is calculated as:
'margin-left' + 'border-left-width' + 'padding-left' + 'width' + 'padding-right' + 'border-right-width' + 'margin-right' -
The total element height is calculated as:
'margin-top' + 'border-top-width' + 'padding-top' + 'height' + 'padding-bottom' + 'border-bottom-width' + 'margin-bottom'
Possible height values:
height value | Comments | CSS |
---|---|---|
length | With this you specify a positive value followed with a unit identifier (it cannot be negative). | 1 |
percentage | With this you specify a value with a percentage. It refer to height of containing block. If the height of the containing block is not specified explicitly, the value is interpreted like 'auto'. | 2 |
auto | The outcome of this property value is much dependant on the related containing block type, replaced or none-replaced elements and the browser. For details, please study computing widths and margins for behavior. | 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 |
Javascript access:
// To SET values ([o] is the target object)
[o].style.height="height value"
// 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.height;
// 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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