I currently have a square image of a car with a transparent background. My goal is to make the car clickable so that when I click on it, it triggers an action. However, I also want the transparency around the car to allow clicks to go through and affect the underlying DOM element, which in this case is another image.
Is there a way to achieve this functionality?
Creating a solution for this issue involves utilizing Pointer events to enable the click event to propagate up the DOM hierarchy, reaching the parent container of an img, while implementing a faux Canvas overlay to detect a transparent pixel as a signal for activating event delegation.
Rooted in the SVG model, Pointer events facilitate event delegation across layers, although they are not currently supported on IE and Opera, as noted inthis resource.
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pointer-events details on Mozilla Developer NetworkFor Further Reading:
Contrary to popular belief, the transparency of an image does not affect how click events are handled. Click events will always occur on the image first before bubbling up to its parent element if they are not blocked.
Even if an image has semi-transparent pixels, such as those with 61% opacity, only a portion of the click event will be relayed to the parent element (in this case, 37%). This scenario highlights why it is not feasible for clicks to be divided in such a way between elements.
To create an engaging user experience, consider encapsulating the car image within an SVG shape and tracking click events on that element.
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