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              <div class="mover"></div>
<div class="mover"></div>
<div class="mover"></div>
<div class="mover"></div>

<div id="controls">
  <label for="tx"><span>0 </span>translateX<span>80</span></label>
  <input type="range" id="tx" min="0" max="80" value="0" />
  <label for="scale"><span>0</span>scale<span>2</span></label>
  <input type="range" id="scale" min="0" max="2" step=".05" value="1"/>
  <label for="deg"><span>-360</span>rotate<span>360</span></label>
  <input type="range" id="deg" min="-360" max="360" value="0"/>
</div>
            
          
!
            
              /*define CSS Variables to be modified by JavaScript*/
:root {
  --tx: 0;
  --ty: 0;
  --scale: 1;
  --deg: 0deg;
}

.mover {
  /* THIS is the important line */
  transform: 
    translate3d(var(--tx), var(--ty), 0) 
    scale(var(--scale)) 
    rotate(var(--deg));
  
  --hue: 120;
  --duration: 2000ms;
  
  transition: transform var(--duration) linear;
  will-change: transform;
  
  background: hsl(var(--hue), 90%, 52%);
  width: 15vmin;
  height: 15vmin;
  border-radius: 10%;
}

/* Give each block a different color and transition duration */
.mover:nth-of-type(2) {
  --hue: 0;
  --duration: 3000ms;
}
.mover:nth-of-type(3) {
  --hue: 40;
  --duration: 4000ms;
}
.mover:nth-of-type(4) {
  --hue: 200;
  --duration: 5000ms;
}




/*General styles for structure and controls */
body {
  height: 100vh;
  overflow: hidden;
  background: hsl(220, 12%, 16%);
}
#controls {
  position: absolute;
  right: 1rem;
  bottom: 50%;
  transform: translateY(50%);
  display: flex;
  flex-direction: column;
}
@media screen and (orientation: portrait) {
  #controls {
    right: 50%;
    bottom: 0;
    transform: translateX(50%);
  }
}
input {
  width: 12rem;
  margin-bottom: 1rem;
}
label {
  display: flex;
  justify-content: space-between;
  color: white;
  font-size: .85rem;
  font-family: system-ui, -apple-system, sans-serif;
}
            
          
!
            
              //Use the input ranges to modify the individual transform properties on the fly, and see that they can be smooth even if you change a different property mid transition. There's no need to remember what the other properties are when you set the new individual value.

//We'll use this to change the CSS Variable values from JS
const style = document.documentElement.style;

/* control elements */
var ranges = {
  translate: document.getElementById('tx'),
  scale: document.getElementById('scale'),
  deg: document.getElementById('deg')
};

//Change the CSS Variable value here
function valueChange(id, value) {
  style.setProperty('--' + id, value);
}

ranges.translate.addEventListener('input', function(e) { 
  valueChange(e.currentTarget.id, e.currentTarget.value + 'vw');
});

ranges.scale.addEventListener('input', function(e) { 
  valueChange(e.currentTarget.id, e.currentTarget.value);
});

ranges.deg.addEventListener('input', function(e) { 
  valueChange(e.currentTarget.id, e.currentTarget.value + 'deg');
});


            
          
!
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