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HTML

CSS

CSS Base

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JavaScript

Babel includes JSX processing.

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HTML

              
                <button type="button" data-toggle-target="#myTogglingElement" data-toggle-class="blue">Toggle</button>

<div id="myTogglingElement">
  This element is targeted by ID and will have the <code>.blue</code> class toggled on it.</div>

<hr>

<button type="button" data-toggle-target=".multi-toggle" data-toggle-class="green">Toggle 2</button>

<div class="multi-toggle">
  This second element is targeted by class and will have the <code>.green</code> class toggled on it.</div>

<div class="multi-toggle">
  This third element is targeted by class and will also have the <code>.green</code> class toggled on it.</div>

<hr>

<button type="button" data-toggle-target="[data-type=test]" data-toggle-class="purple">Toggle 3</button>

<div data-type="test">
  This element is targeted by data attribute and will have the <code>.purple</code> class toggled on it.</div>
              
            
!

CSS

              
                body {
  padding: 1.5rem;
  margin: 0;
  font: 1rem/1.5 sans-serif;
}

button {
  display: inline-block;
  padding: 0.5rem 1rem;
  margin-bottom: 0.5rem;
  font-size: 1rem;
  background-color: #fff;
  border: 1px solid rgba(0, 0, 0, 0.25);
  border-radius: 0.4rem;

  &:hover,
  &:focus {
    background-color: #f5f5f5;
  }
  &:active {
    background-color: #eee;
  }
}

.blue {
  color: royalblue;
}
.green {
  color: green;
}
.purple {
  color: purple;
}

hr {
  margin-block: 1.5rem;
}

div {
  position: relative;
  padding: 0.5rem;
  margin-block: 0.5rem;
  border-left: 0.25rem solid;

  &::after {
    position: absolute;
    inset: 0;
    display: block;
    content: "";
    background-color: currentColor;
    opacity: 0.05;
  }
}

              
            
!

JS

              
                let toggler = document.querySelectorAll("[data-toggle-target]")

if (toggler) {
  toggler.forEach(function (element) {
    let target = element.getAttribute("data-toggle-target")
    let targets = document.querySelectorAll(target)
    let toggleClass = element.getAttribute("data-toggle-class")

    element.addEventListener("click", (event) => {
      targets.forEach(function (e) {
        e.classList.toggle(toggleClass)
      })
    })
  })
}

              
            
!
999px

Console