JSFiddle - React, Tailwind, and code Playground

by DelphinPRO

HTML

<div class="container">
  <div class="one">--------------</div>
  <div class="two">--------------LOGO----------------</div>
</div>

CSS

.container {
  border: 1px solid;
  display: flex;
  height: 100px;
	
	justify-content: space-between;
	
	--variable-width: 20px;
}
.one {
  background-color: #f00;
}
.two {
  background-color: #00f; color: #fff;
}

.container::before {
	display: block;
	content: '';
	/* background: magenta; */
	order: 100;
	min-width: 10px;
	width: var(--variable-width, 10px);
}







.container {
  position: relative;
}
.container::after {
  content: '';
  position: absolute;
  top: 100%;
  width: 2px;
  height: 50px;
  left: 50%;
  margin-left: -1px;
  background-color: #f00;
}
.two {
  position: relative;
}
.two::after {
  content: '';
  position: absolute;
  top: 50%;
  width: 2px;
  height: 50%;
  left: 50%;
  margin-left: -1px;
  background-color: #f00;
}

JavaScript

document.querySelectorAll('.container').forEach(container => {

  const one = container.querySelector('.one');
  container.style.setProperty('--variable-width', one.offsetWidth + 'px');

});