Z-index

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Z-index In HTML5, there is a layering of elements in which different visusal contents can be layered one over the other using CSS For this to accomplish, you need to use the z-index property and an integer(positive or negative) depending on which layer you should position it over or under other items.

Example: If you want an image to be layered over a div tag ,you need trher following CSS code:
div {
z-index : 0
}
img {
z-index : 1
}

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