CSS3 Positioning Elements Tutorial for Beginners

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CSS3 Positioning Elements Tutorial Videos for
Beginners by
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Highlights

• Using Display Visibility Property
• Using Floating Elements
• Applying Fixed Positions
• Applying Relative Positions
• Applying Absolute Positions
• Overlapping of Elements

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Using Display Visibility Property

• Display property specifies the type of box used
  for an HTML element.
• Syntax for displaying ltpgt elements as inline
  elements p.inline display inline
• Visibility property specifies whether or not an
  element is visible.
• Syntax h2 visibility hidden visibility
  visiblehiddencollapseinitialinherit
•        

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Using Floating Elements

• Float is used to position the CSS elements.
• Float properties commonly and appropriately
  called as "text wrap".
• Left , Right , None, inherit are four valid float
  values.
• Syntax img   float right margin 0 0 10px
  10px
• Clear, float, overflow, overflow-x, overflow-y
  are properties of floating elements.
• Apart from wrapping text around images, floats
  also used to create entire web layouts.     

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Applying Fixed Positions

• Fixed position element is positioned relative to
  the viewport or the browser window itself.
• Fixed positioned element will stay right which
  not affected by window scrolling.
• Fixed positioned elements are always relative to
  the document.
• Syntax h2  position fixed left 100px
  top 150px
• Fixed position values are similar to absolute
  position values.      

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Applying Relative Positions

• Lays out all the elements as through the element
  were not positioned.
• Adjust the element's position, without changing
  layout.
• More intimately related to static positioning
  property.
• At first relative lays out as static element then
  generated content box moves according to
  top, bottom, left and right properties.
• Syntax divmyDIV position relative
  width115px height115px
• backgroundorange left20px top115px

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Applying Absolute Positions

•  Places HTML elements on the page at a specific
  spot.
• Takes out one element from web documents and
  places it on other elements.
• Relative positioning gives you the control
  to absolutely position  
• Provides very good cross browser support, Less
  dependent on floats and margins.
• Syntax divmyDIV position absolute
  width115px height115px background
  green left15px top115px

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Overlapping of Elements

• Overlapping of elements situation arises when one
  element positioning is fixed.
• Negative margin  pull the element over another or
  Absolutely positioned elements overlap each
  other. 
• Uses z-index property to overcome the situation.
• By default, elements are stacked by their
  position in the HTML code. Z property allows to
  specify where elements have to be placed.

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