What is the default CSS Z index?
The default z-index value of all the elements on a web page is auto, which corresponds to 0 where no z-index is assigned. An element with z-index: -1 will be displayed behind all other elements on the page, assuming they are given no z-index values.
What is the highest Z-index?
What’s the Maximum Z-Index?
| Browser | Max z-index value | When exceeded, value changes to: |
|---|---|---|
| Internet Explorer 8 | 2147483647 | 2147483647 |
| Firefox 2 | 2147483647 | *element disappears* |
| Firefox 3 | 2147483647 | 0 |
| Safari 3 | 16777271 | 16777271 |
What does Z-Index 1 mean?
div { z-index: 1; /* integer */ } 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).
Why is Z-Index not working CSS?
TL;DR: the most common cause for z-index not working is not explicitly declaring a CSS position value (i.e. position: relative, absolute, fixed or stick) on the element. But if this hasn’t solved your z-index issue or just want to get a little more information about the CSS property, then let’s go a little deeper.
Why is my Z-Index 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.
What is the z index property in CSS?
div { z-index: 1; /* integer */ } 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).
What is the value of the z index?
To demonstrate that z-index only works on positioned elements, here are the same three boxes with z-index values applied to attempt to reverse their stacking order: The grey box has a z-index value of “9999”; the blue box has a z-index value of “500”; and the gold box has a z-index value of “1”.
What is the z index of the Blue Box?
The grey box has a z-index value of “9999”; the blue box has a z-index value of “500”; and the gold box has a z-index value of “1”. Logically, you would assume that the stacking order of these boxes should now be reversed.
What does it mean to ignore z index in HTML?
This was not a coincidence: the z-index rule only works on “positioned elements”. Forgetting to apply a position rule will effectively ignore the z-index rule. A positioned element is an HTML element that’s either relative, absolute, fixed, or sticky. Basically, it’s anything besides static.