JSFiddle - React, Tailwind, and code Playground

HTML

<div class="myDiv">

</div>

CSS

.myDiv {
  height: 270px;
  background-image: url(https://cs.dotabuff.com/assets/skills/naga-siren-mirror-image-5467-b4c7b9ba448cd320a702dc27512f3bbdd5613c943ae322654163f6dca7592819.jpg);
  background-repeat: repeat;
}

JavaScript

const PIC_H = 128;
[...document.getElementsByClassName('myDiv')]
	.filter(el => el.offsetHeight % PIC_H > 0)
  .forEach(el => {
  	const newSize = el.offsetHeight + PIC_H - (el.offsetHeight % PIC_H);
		el.style.height = `${newSize}px`;
  });