JSFiddle - React, Tailwind, and code Playground

HTML

<div class="slider">
    <span>button here</span>
    <div class="slide">
        <img src="https://loremflickr.com/1000/1000" alt="Bacn">
    </div>
    <span>button here</span>
</div>

CSS

.slider {
  display: flex;
  align-items: center;
  height: 100vh;
  background-color: red;
}

.slider>span {
  flex-shrink: 0;    /* disables shrinking feature */
}

.slider>.slide {
  flex: 1;          /* consume all free space */
  height: 100%;
}

.slider .slide img {
  width: 100%;
  max-height: 100%;
  object-fit: cover;
  vertical-align: bottom;
}

* {
  margin: 0;
  padding: 0;
}