Table of Contents
Why is Z-index ignored?
By default, every element has a position of static. z-index only works on positioned elements (relative, absolute, fixed, sticky) so if you set a z-index on an element with a static position, it won’t work.
Which position does the Z-index not work with?
The second div is position: static (the default) so the z-index does not apply to it. You need to position (set the position property to anything other than static , you probably want relative in this case) anything you want to give a z-index to.
What is the purpose of Z-index in CSS positioning?
The z-index property in CSS controls the vertical stacking order of elements that overlap. As in, which one appears as if it is physically closer to you. z-index only affects elements that have a position value other than static (the default).
How do I fix problems with CSS position sticky not working?
Position sticky will most probably not work if overflow is set to hidden, scroll, or auto on any of the parents of the element. Position sticky may not work correctly if any parent element has a set height. Many browsers still do not support sticky positioning. Check out which browsers support position: sticky.
What the heck is Z index?
When we give an element a z-index, that value is only compared against other elements in the same context. z-index values are not global. By default, a plain HTML document will have a single stacking context that encompasses all nodes.
Does z-index work on position positions?
Note: z-index only works on positioned elements (position: absolute, position: relative, position: fixed, or position: sticky) and flex items (elements that are direct children of display: flex elements). Here we see that an element with greater stack order is always above an element with a lower stack order:
Why is my z-index negative in CSS?
This happens because the z-index property is ignored in position: static;, which happens to be the default value; so in the CSS code you wrote, z-index is 1 for both elements no matter how high you set it in #over. By giving #under a negative value, it will be behind any z-index: 1; element, i.e. #over.
What if two positioned elements overlap without a z-index?
Note: If two positioned elements overlap without a z-index specified, the element positioned last in the HTML code will be shown on top. yes. Read about animatable Try it
What is the z-index for underpositioned elements?
Positioned elements (and their children) with positive z-index values (higher values are stacked in front of lower values; elements with the same value are stacked according to appearance in the HTML) So you can set a z-index of -1, for #underpositioned -ve z-index appear behind non-positioned #overelement