JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Horizontal Scroll on Vertical Mouse Scroll</title>
  <style>
    body {
      margin: 0;
      padding: 0;
      overflow: hidden;
    }

    .gallery {
      display: flex;
      overflow: hidden;
      width: 100vw;
      height: 100vh;
      cursor: grab;
    }

    .gallery img {
      width: 100%;
      height: auto;
    }
  </style>
</head>
<body>
  <div class="gallery">
    <img src="https://img.freepik.com/free-photo/funny-monkey-with-glasses-studio_23-2150844104.jpg" alt="Image 1">
    <img src="https://wallpapers.com/images/featured/funny-pictures-dzujtlgoq3utq7j4.jpg" alt="Image 2">
    <img src="https://static.vecteezy.com/system/resources/thumbnails/031/693/879/small_2x/portrait-of-a-funny-pig-wearing-a-hat-and-sunglasses-on-a-black-background-ai-generative-photo.jpg" alt="Image 3">
    <img src="https://via.placeholder.com/600x300" alt="Image 4">
  </div>
  <script>
    document.addEventListener('DOMContentLoaded', () => {
      const gallery = document.querySelector('.gallery');

      let isScrolling;
      
      gallery.addEventListener('wheel', (e) => {
        clearTimeout(isScrolling);
        
        isScrolling = setTimeout(() => {
          if (e.deltaY !== 0) {
            // e.deltaY > 0 => scrolling down
            // e.deltaY < 0 => scrolling up
            gallery.scrollLeft += e.deltaY;
          }
        }, 6); // debouncing
      });
    });
  </script>
</body>
</html>