Glass-pane or angular/HTML overlay on a designated element



Is there a way to create a glass-pane effect, like an hourglass symbol on a semi-transparent layer, within the boundaries of an HTML element E? The goal is to have the glass-pane only overlap the area within E's boundaries. When the glass-pane is activated, it should block access to anything behind it.
We attempted using the uibModal library, but it covers the entire window instead of overlapping a specific element as needed.

Thank you,

Rami

Answer №1

One clever technique involves utilizing the powerful z-index property along with a touch of opacity.

Imagine you have a sidebar element that is 300px wide and spans the full height of the viewport:

<aside style="width:300px; height:100vh; float:right; z-index:1;"> </aside>

To achieve a watermark-like effect, simply insert a div within it with position:absolute (to avoid interfering with other elements) and a higher z-index value:

<aside class="parent">
  <div class="pane"></div>
</aside>

The corresponding CSS would be:

.parent{
    width:300px; /*adjust based on your design*/
    height:100vh; 
    float:right; /*customize positioning as needed*/
    z-index:1; 
}
.pane{
    height:100vh; /*expands to cover parent div*/
    width: 300px; 
    z-index:2; 
    position:absolute; 
    opacity: 0.6; /*adds pane effect*/
 }

By following this approach, you'll create an unclickable "watermark" on your div with a subtle pane effect.

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