<div class="wrapper">
  <div class="options">
    <pre>
.no2 {
  vertical-align:<select class="select1">
          <option value="baseline" selected>baseline</option>
          <option value="top">top</option>
          <option value="middle">middle</option>
          <option value="bottom">bottom</option>
          <option value="super">super</option>
          <option value="sub">sub</option>
        </select>;
}
    </pre>
  </div>
  
  <div class="demo">
    <div class="element no1">1</div>
    <div class="element no2">2</div>
  </div>
</div>
html,
body { 
  height: 100%; 
  overflow: hidden;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
}

.wrapper {
  display: flex;
  width: 100%;
  max-width: 720px;
  justify-content: center;
  align-items: center;
  box-sizing: border-box;
}

.options {
  flex: 0 1 auto;
  display: flex;
  justify-content: center;
}

.demo {
  flex: 0 0 auto;
  text-align: left;
  padding: 20px 0 20px 20px;
}

.element {
  display: inline-block;
  justify-content: center;
  align-items: center;
}

.no1 {
  font-size: 30px;
  padding: 50px 10px;
}

.no2 {
  vertical-align: super;
  padding: 10px 10px;
}
const selectList = document.querySelectorAll('select');
const s1 = document.querySelector('.select1');
const no2 = document.querySelector('.no2');

selectList.forEach(select => select.addEventListener('change', () => {
  no2.style.verticalAlign = `${s1.value}`;
}))

External CSS

  1. https://tim-montmorency.com/timdoc/shared/styles/codepen.css

External JavaScript

This Pen doesn't use any external JavaScript resources.