Transform rotate live visualize

by Julien Roche

HTML

<body class="main">
  <section class="main__visualizer">
    <div class="main__visualizer__rect"></div>
  </section>
  <footer class="main__editor">
    <label>
      <span>X</span>
      <input type="range" min="-360" max="360" value="0" step="1" name="x" />
    </label>
    <label>
      <span>Y</span>
      <input type="range" min="-360" max="360" value="0" step="1" name="y" />
    </label>
    <br />
    <br />
    <output name="cssConfiguration"></output>
  </footer>
</body>

CSS

html,
body {
  border: none;
  height: 100%;
  margin: 0 0 0 0;
  padding: 0 0 0 0;
  width: 100%;
}

:root {
  --x: 0deg;
  --y: 0deg;
}

.main {
  background-color: white;
  display: flex;
  flex-direction: column;
}

.main__visualizer {
  align-items: center;
  display: flex;
  flex: 1 1 auto;
  justify-content: center;
  margin-bottom: 1rem;
}

.main__visualizer__rect {
  border: 1px solid black;
  transform: rotate(var(--x), var(--y));
  height: 5rem;
  width: 20rem;
}

.main__editor {
  border-top: 1px solid black;
  flex: 0 0 150px;
  margin-top: 1rem;
}

Babel + JSX

// https://developer.mozilla.org/en-US/docs/Web/CSS/initial-letter
let cssConfigurationOutputElement = document.querySelector('[name="cssConfiguration"');
let sampleElement = document.querySelector('.main__visualizer__rect');

document.addEventListener('input', event => {
	let inputName = event.target.name;
  document.documentElement.style.setProperty(`--${inputName}`, `${event.target.value}deg`);
  updateCssConfigurationOutput();
}, false);

function updateCssConfigurationOutput() {
	cssConfigurationOutputElement.value = `transform: ${window.getComputedStyle(sampleElement)['transform']}`;
}

updateCssConfigurationOutput();