Pass mouse events through absolutely-positioned element
Enable click-through on an overlay with CSS by setting pointer-events: none;
. It lets mouse events pass to elements underneath.
Applying the .transparent
class to your overlay makes it mouse-interactive. Take a look:
Now, your overlay zips by like an Olympic sprinter, providing users with a smoothly running UX.
Mechanism in a Nutshell
The functionality pointer-events: none;
gifts us is seminal for complex scenarios where we want layered interactive content while maintaining crisp maneuverability. Let's dive down this rabbit hole together:
Setting pointer-events: none;
for an element initializes "Now you see me, but can't touch me" mode, ignoring all mouse events, which then pass to the yonder layer. Handy for complex layouts with overlapping UI elements or maintaining non-invasive interactions atop main content.
What if you want certain child elements still clickable within your transparent overlay? Set pointer-events: all;
for the rebellious bunch. This could be a lifesaver in a menu or interactive graphics case.
Sometimes you might need to programmatically determine the element below. For those brain-itching times, recall document.elementFromPoint(x, y)
. It finds true love behind the scenes and handles your events gracefully π.
Older browsers or alien tech posing existential threat to pointer-events
? Adapt and survive using an alternative β hide the top div, use document.elementFromPoint
to pinpoint the secret lover and restore the status quo.
Remember to check global support β pointer-events
enjoys support of almost 98.2%, gracing even the stage of IE11.
Interaction Layers and Event Propagation
Create rich, highly interactive UIs by using transparent divs to create interaction layers and apply pointer-events
to control which elements respond to user haymakers.
Mouse events hit the DOM like a meteor strikes the Earth, sinking all the way and then re-emerging. This two-way journey β capture and bubble β can be optimally harnessed.
You can create layers that rise like tides by adjusting the z-index, toggle pointer-events
to your needs, and even use JavaScript to dynamically flip the switches.
Global Support and Potential Caveats
To avail pointer-events
in projects, remember:
- Check Support: Blink, Gecko and Webkit have it, but does your user's browser?
- Fallback if Unsupported: JavaScript may just bail you out.
- Performance: Everything at a price. Increasing complexity can slow things down.
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