How to Invert Text Color on Mouse Hover Using Clip-Path?

Invert text color on mouse hover

The question presents a scenario where a user wants to invert the color of black text upon hovering over it using a custom black cursor, as demonstrated in a provided GIF. While the user has attempted to create this effect using CSS and JavaScript, they have been unsuccessful, with the code only turning the cursor white but not inverting the black text.

Solution

The solution offered here employs the concept of clip-path to achieve the desired effect. It involves duplicating the text to create two layers, one with black text and the other with white text. By using clip-path and adjusting its position based on the cursor's movement, the top layer can be revealed, inverting the color of the text beneath it.

The following code demonstrates this solution:

<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>

In this code, the h1 element contains the black text along with a duplicate layer below it with white text. The clip-path on the top layer is adjusted based on the cursor's position, revealing the white text underneath and effectively inverting the color of the black text.

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