CSS Element Visbility
Hiding an Element-display: none or visibility :hidden
Hiding an element can be done by setting the display property to “none” or the visibility property to “hidden”. However, notice that these two methods produce different results: Visibilyt:hidden hides an element, but it will still take up the same space as before.The element will be hidden, but still affect the layout.
Example
h1.hidden{visibility:hidden;} <html> <head> <style type=”text/ccs”> h.hidden{visibility:hidden;} </style> </head> <body> <h1>This is a visible heading</h1> <p>Notice that the hidden heading still takes up space.</p> </body> </html>
Display
none hides an element, and it will not take up any space.The element will be hidden, and the page will be and displayed as the element is not there:
Example
H1.hidden{display:none:} <html> <head> <style type=text/ccs”> H1.hidden(display:none;) </style> </head> <body> <h1> This is a visible heading</h1> <h1 class=”hidden”>This is a hidden heading</h1> <p> Notice that the hidden heading does not take up Space.</p> </body> </html>
CSS Display-Block and Inline elements
A block element is an element that takes up the full width available, and has a line break before and after it. Examples of block elements:
- <h1>
- <p>
- <div>
An inline element only takes up as much width as necessary,and does not force line breaks. Examples of inline elements:
- <span>
- <a>
An inline element only takes up much width as necessary, and does not force line breaks.
Examples of inline elements
- <span>
- <a>
Changing How an Element is displayed
Changing an inline element to block element, or vice versa, can be useful for making the page look a specific way, and still follow web standards. The following example displays list items as inline elements:
Example
li{display:inline;} <html> <head> <style type=text/ccs”> l1 (display:inline;) </style> </head> <body> <p> Display this link list as a horizontal menu:</p> <ul> <li><a href=”/html/default.asp”targer=”_blank”HTML</a></li> <li><a href=”/css/default.asp”targer=”_blank”CSS</a></li> <li><a href=”/js/default.asp”targer=”_blank”JavaScript</a></li> <li><a href=”/xml/default.asp”targer=”_blank”>XML</a></li> <ul> </body> </html> The following example displays span elements as block elements:
Example
Span{display:block;} </html> </head> </style type=”text/css” > Span { Display:block; } </style> </head> <body> <h2>Nirvana</h2> <span>record:MTV Unplagged in New York</span> <span>Year:1993</span> <h2>Radiohead</h2> <span>Record:OK Computer</span> <span>Year:1997</span> <body> </html>
Note
Changing the display type of an element changes only how the element is displayed. Not what kind of element it is. For example: An inline element set to display :block is not allowed to have a block element nested inside of it.
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