Ensuring that hover remains active despite mousedown in JavaScript, CSS, and HTML

It appears that in browser-javascript hover events are deactivated when the mouse button is pressed down, as demonstrated by the following example: (Please run the code snippet to witness what I am referring to.)

* { user-select: none; }
#click, #drag, #hover {
  position: absolute;
  box-sizing: border-box;
  box-shadow: inset 0 0 0 4px rgba(0, 0, 0, 0.3);
  text-align: center;
  color: #ffffff;
  cursor: default;
}
#click {
  width: 150px; height: 150px; line-height: 150px;
  left: 10px; top: 50%; margin-top: -75px;
  background-color: #d00000;
}
#drag {
  width: 220px; height: 50px; line-height: 50px;
  left: 160px; top: 50%; margin-top: -25px;
  background-color: #900000;
}
#hover {
  width: 200px; height: 200px; line-height: 200px;
  left: 380px; top: 50%; margin-top: -100px;
  background-color: #000000;
  white-space: nowrap;
}
#hover:after {
  content: "This element has hover effects";
  position: absolute;
  display: inline-block;
  color: #909090;
  left: 5px; top: -80px;
  font-size: 11px;
}
#hover:hover {
  background-color: #ffffff;
  color: #000000;
}
<div id="click">
  Click here
</div>
<div id="drag">
  --> Now drag this way -->
</div>
<div id="hover">
  No hover effect
</div>

When the mouse button is released, hover events resume functioning normally on the rightmost div.

Is there a way to enable hover events on any element even when the mouse button is held down? Seeking solutions using css, pure javascript, or html.

Answer №1

To tackle this issue, a purely CSS solution may not be possible due to the nature of how it functions. Overriding such behavior with CSS is quite challenging.

One viable approach would be to manually incorporate hover functionality using mouseenter, mouseover, mouseout, and/or mouseleave event listeners.

Here's an example implementation:

const myElement = document.querySelector('#myElement');

myElement.addEventListener('mouseenter', ({ target }) => target.classList.add('hovering'));
myElement.addEventListener('mouseleave', ({ target }) => target.classList.remove('hovering'));
div {
  width: 100px;
  height: 100px;
  border: 1px solid #000;
  background: #F00;
}

div.hovering {
  background: #0F0;
}
<div id="myElement"></div>

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