About masking layers

Like UL >li>a>img this situation, you need to put the mouse on the picture to show the mask layer, the mouse away from the picture hidden mask layer, pay attention to mask layer coverage problem, that is, the element triggering event can not be IMG, or the mouse on the IMG trigger event, mask layer display, This time the mask layer will cover the IMG and cause the mouse to leave the event without execution or error.

You can set the element that triggers the event as the parent element of the mask layer, such as setting the mask layer to a child element, a to trigger the event element, so that the effect of the mask overlay on the event trigger does not occur.

About masking layers