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Thread: What is z-index and where it's work?

  1. #1
    Join Date
    Sep 2013
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    2

    Exclamation What is z-index and where it's work?

    I'm mamun from Bangladesh.

    I'm new of web development and i really want to know what is z-index also which of part it can be used? http://www.webdeveloper.com/forum/im...s/confused.gif
    Can anyone please help me. Actually i'm not able to do that.

    Tnx and Regards,
    Mamun

  2. #2
    Join Date
    Mar 2011
    Posts
    1,147
    Search on "css z-index tutorial" and I'm sure you'll find your answer. You can't learn everything in a forum.

  3. #3
    Join Date
    May 2005
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    Gold Coast (MS)
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    From Wikipedia, the free encyclopedia:

    z-index is a CSS property that sets the stack order of specific elements. An element with greater stack order is always in front of another element with lower stack order.

    p {
    position: relative;
    z-index: -1;
    }

    Negative stack orders can also be used in the same manner. A negative value will appear behind a more positive one. z-index only works on elements that have a position value (e.g. position: relative.

    SOURCE

  4. #4
    Join Date
    Sep 2013
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    221
    Every webpage is made up of what are called stacking contexts. You can think of these as, quite literally, a stack of elements. The z-index property determines the order of items in each stack, with higher z-index being placed further up.

    All pages begin with a root stacking context, which builds from the root element (as you'd expect). But more stacking contexts can be created in a number of ways. One way is an absolutely positioned div; its children will be in a new stacking context.

    The specs lists all of the instances that create a new stacking context. As others have stated, this includes explicitly positioned elements and will soon include elements that aren't completely opaque.

    z-index only takes effect if you explicitly set the position of the element. This means setting it to be fixed, absolute, or relative.

  5. #5
    Join Date
    Sep 2013
    Posts
    2
    Thank you so much for your solution.

    Really tnx all of you people

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