Z-index Not Working?

Why my Z-index is not working?

If you set position to other value than static but your element’s z-index still doesn’t seem to work, it may be that some parent element has z-index set. The stacking contexts have hierarchy, and each stacking context is considered in the stacking order of the parent’s stacking context.

Does Z-Index work on fixed?

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).

What is Z-Index 9999?

CSS layer refer to applying z-index property to element that overlap to another element. CSS z-index property always work with absolute as well as relative positioning value. CSS z-index possible value 0, positive (1 to 9999 ) and negative (-1 to -9999) value to set an element.

Can I use negative Z-index?

You can have negative z-index To place an element on a layer below another one, it just has to have a lower value of z-index but that lower value can be negative. One area where this is useful is when using pseudo elements and wanting to position them behind the content of their parent element.

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Do child elements inherit Z-index?

No, it isn’t inherited. You can see it in MDN article. However, be aware that z-index sets the z-position relatively to the stacking context. And a positioned element with non auto z-index will create an stacking context.

How do you avoid Z-index?


  1. Understand how stacking works, and use the rules to your advantage to avoid using z-index, as long as it makes sense.
  2. Keep z-index values low: you’ll rarely need more than z-index: 1 (or less than z-index: -1 )
  3. Create stacking contexts to keep things boxed and prevent them from interfering with each other.

Why is my 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 is the maximum Z Index Value?

The maximum range is ±2147483647. In CSS code bases, you’ll often see z-index values of 999, 9999 or 99999. This is a perhaps lazy way to ensure that the element is always on top. It can lead to problems down the road when multiple elements need to be on top.

What is the purpose of the Z index and how is it used?

The z-index property is used to displace elements on the z-axis i.e in or out of the screen. It is used to define the order of elements if they overlap on each other.

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How does Z-order work?

The z-index property determines the stack level of an HTML element. The “stack level” refers to the element’s position on the Z axis (as opposed to the X axis or Y axis). A higher value means the element will be closer to the top of the stacking order. This stacking order runs perpendicular to the display, or viewport.

Why is the Z-Index 1000?

z-index defines which positioned element appears on top (Sort of like layers). So z-index: 1000 would appear on top of a z-index 999. As mentioned above it is used for stacking elements. If they or their pieces are positioned at same place, the one with higher z-index will be on top.

Why do we use Z-index?

The z-index CSS property sets the z-order of a positioned element and its descendants or flex items. Overlapping elements with a larger z-index cover those with a smaller one.

What happens when you assign a negative Z-index value to an element?

Setting negative z-index (< 0) to an element will stack the element behind its parent. However, if the parent is the root element of a stacking context, <html> creates the default stacking context, a negative z-index will still stack in front of the parent element.

What is the default value of Z-Index?

Default z-index of any element is ‘auto’ with exception of <html> which has default z-index:0. ‘Auto’ means that element gets z-index from its parent. You can see this by using Developer Tools (in Chrome) or any similar tool in other browser.

How do I fix Z-index in CSS?

To sum up, most issues with z-index can be solved by following these two guidelines:

  1. Check that the elements have their position set and z-index numbers in the correct order.
  2. Make sure that you don’t have parent elements limiting the z-index level of their children.

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