Screen Capture (Chrome, macOS):
https://i.sstatic.net/WPFu7.png
CSS Code:
input[type="number"] {
height: 32px;
border-radius: 4px;
border: 1px solid #d8d8d8;
position: relative;
text-align: center;
font-size: 20px;
width: 80px;
outline: none;
background-image: url('data:image/svg+xml;utf8,%3Csvg%20version%3D%221.1%22%20viewBox%3D%220%200%2050%2067%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%3Cg%20fill%3D%22none%22%20stroke-width%3D%222%22%3E%3Cline%20x1%3D%221%22%20x2%3D%2250%22%20y1%3D%2233.5%22%20y2%3D%2233.5%22%20stroke%3D%22%23D8D8D8%22%2F%3E%3Cpolyline%20transform%3D%22translate(25%2020)%20rotate(45)%20translate(-25%20-20)%22%20points%3D%2219%2026%2019%2014%2032%2014%22%20stroke%3D%22%23000%22%2F%3E%3Cpolyline%20transform%3D%22translate(25%2045)%20rotate(225)%20translate(-25%20-45)%22%20points%3D%2219%2052%2019%2039%2032%2039%22%20stroke%3D%22%23000%22%2F%3E%3C%2Fg%3E%3C%2Fsvg%3E');
background-position: center right;
background-size: contain;
background-repeat: no-repeat;
caret-color: transparent;
}
input[type="number"]::-webkit-inner-spin-button {
-webkit-appearance: none !important;
opacity: 1 !important;
background: transparent !important;
border-width: 0px;
margin: 0;
border-left: 1px solid #d8d8d8;
height: 34px;
width: 23px;
cursor: pointer;
}
<input type="number" value="1" />
This level of customization is achievable. However, it may introduce fragility to your layout and impact usability. It's recommended to stick with native platform controls for better consistency and user experience.