CSS Reference

"max-height" - css property (v. css 2)

  • Sets the maximum height of an element.
  • Together with 'min-height' it constrain the height of elements to a certain range.
  • If the computed value of 'min-height' is greater than the value of 'max-height', 'max-height' is set to the value of 'min-height'.
  • If the computed height is greater than 'max-height', the rules above are applied again, but this time using the value of 'max-height' as the specified value for 'height' .
  • If the computed height is smaller than 'min-height', the rules above are applied again, but this time using the value of 'min-height' as the specified value for 'height'.
  • Initial value: none
  • The property is not inherited
  • HTML usage: All elements except non-replaced inline elements and table elements
  • Browsers that support the max-height - property :
    Internet Explorer Mozilla Firefox Opera Google Chrome Apple Safari

Possible min-height or max-height values:

values Comments CSS
length With this you specify a positive value followed with a unit identifier for a fixed minimum or maximum computed height (it cannot be negative). 1
percentage With this you specify a value with a percentage. It refer to min-height or max-height of containing block. If the height of the containing block is not specified explicitly, and this element is not absolutely positioned, the percentage value is treated as initial. 2
none This is only on 'max-height'. It means there is no limit on the height of the box. 2
inherit Will inherit the value from parent specification. 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.maxHeight="max-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.maxHeight;
// 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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