JSFiddle - React, Tailwind, and code Playground

by HDL52

HTML

<section>
  <h2>Paragraph</h2>
  <div class="glass"></div>
</section>

CSS

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

section {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: url(https://raw.githubusercontent.com/Hongda-OSU/PicGo-2.3.1/master/imge39twvhffwemdsipqncbwko5vayrxgd.jpg);
  background-position: center;
  background-attachment: fixed;
  background-size: cover;
  overflow: hidden;
}

section h2 {
  font-size: 5em;
  color: #fff;
  pointer-events: none;
  text-shadow: 0 10px 20px rgba(0, 0, 0, 0.5);
}

section .glass {
  position: absolute;
  transform: translate(-50%, -50%);
  pointer-events: none;
  width: 300px;
  height: 200px;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.2);
  background: transparent;
  backdrop-filter: blur(10px);
  transition: 0.2s;
}

JavaScript

// https://juejin.cn/post/7313911560442462208

let glass = document.querySelector(".glass");
let mouseX = 0, mouseY = 0;

document.addEventListener("mousemove", function (e) {
  mouseX = e.pageX;
  mouseY = e.pageY;
});

function moveGlass() {
  glass.style.left = mouseX + "px";
  glass.style.top = mouseY + "px";
  requestAnimationFrame(moveGlass);
}

moveGlass();