Float a div above page content

You want to use absolute positioning. An absolute position element is positioned relative to the first parent element that has a position other than static. If no such element is found, the containing block is html For instance : To get it to work, the parent needs to be relative (position:relative) In your case this should … Read more

Why does z-index not work?

The z-index property only works on elements with a position value other than static (e.g. position: absolute;, position: relative;, or position: fixed). There is also position: sticky; that is supported in Firefox, is prefixed in Safari, worked for a time in older versions of Chrome under a custom flag, and is under consideration by Microsoft to add to their Edge browser.

Why does z-index not work?

The z-index property only works on elements with a position value other than static (e.g. position: absolute;, position: relative;, or position: fixed). There is also position: sticky; that is supported in Firefox, is prefixed in Safari, worked for a time in older versions of Chrome under a custom flag, and is under consideration by Microsoft … Read more