How to create an inverted text color effect on mouse hover with CSS and JavaScript?

Invert Text Color on Mouse Hover

The goal is to invert the color of a text element while hovering over it with a black cursor. The effect should be similar to the following GIF:

[GIF demonstrating the effect]

To achieve this effect with CSS and JavaScript, we'll use a combination of techniques:

1. Create a duplicate text layer: Duplicate the text element and position it directly on top of the original. Invert the color of the duplicate text layer to white.
2. Use clip-path to reveal the top layer: Use a clip-path to define a circular area that will reveal the inverted text layer.
3. Listen for mouse movements: When the user moves the cursor over the text, adjust the clip-path's position to match the cursor's movement.

Here's an example implementation:

<code class="javascript">var h = document.querySelector('h1');
var p = h.getBoundingClientRect();
var c = document.querySelector('.cursor');

document.body.onmousemove = function(e) {
  // Adjust the cursor position
  c.style.left = e.clientX + 'px';
  c.style.top = e.clientY + 'px';

  // Adjust the clip-path
  h.style.setProperty('--x', (e.clientX - p.top) + 'px');
  h.style.setProperty('--y', (e.clientY - p.left) + 'px');
};</code>

<code class="css">body {
  cursor: none;
}

h1 {
  color: #000;
  display: inline-block;
  margin: 50px;
  text-align: center;
  position: relative;
}

h1:before {
  position: absolute;
  content: attr(data-text);
  color: #fff;
  background: #000;
  clip-path: circle(20px at var(--x, -100%) var(--y, -100%));
}

.cursor {
  position: fixed;
  width: 40px;
  height: 40px;
  background: #000;
  border-radius: 50%;
  top: 0;
  left: 0;
  transform: translate(-50%, -50%);
  z-index: -2;
}</code>

<code class="html"><h1 data-text="WORK">WORK</h1>

<span class="cursor"></span></code>

By combining these techniques, we can create the desired text color inversion effect on mouse hover.

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