HTML/CSS Question: How does the z-index property work with the position:

I have a lengthy table containing numerous rows.

My goal is to implement an on-hover effect for the rows, where a popup div will appear displaying additional information specific to that particular row.

My initial solution involved using a div element and toggling its visibility upon hover.

The challenge I'm facing lies in the implementation of this feature using HTML/CSS.

How can I incorporate a hover-triggered div into the table without compromising its appearance?

I initially considered using z-index in combination with a relative position, but I haven't been able to make it work as intended.

htmlcss

Answer №1

For optimal positioning, consider using 

position:abolute; top: 10px; left: 20px; z-index: 1
for the div, and apply position: relative to the tr. (the values for top and left are examples - adjust as needed for your layout)

By giving the row a relative position, it maintains its context in the layout. Absolute positioning of the div ensures that its placement is calculated based on its parent element (in this case, the row). Without the relative positioning on the row, the div would be positioned absolutely to either the body or another parent element with a defined position.

Answer №2

When elements have the same z-index, the browser will display them in the order they appear in the HTML code. This means that setting a specific z-index may not be necessary. An example of this can be seen in this DEMO. (Try hovering over the top left cell or the third from the top in the second column). Just ensure that the divs you want to highlight are positioned below the table you wish to emphasize.

Answer №3

Should you limit your project to just HTML and CSS, or is it permissible to delegate hover functionality to JavaScript?

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