संख्या को छोड़कर सभी पाठ इनलाइन-शैली पट्टी कैसे प्राप्त करें?

function rotateMe() {
  var lineStyle = document.getElementById('toRotate').style;
  var rotate = document.querySelector('input[name="rotate"]:checked').value;
  var styNum = lineStyle.transform.replace(/[^0-9]/g, '');
  var calAmount = 0;  
  var rotateScale = parseInt(document.getElementById('rotatescale').value);

  if(rotate == 'right')
  {
  calAmount = parseInt(styNum) + rotateScale;
  }
  else
  {
  calAmount = (-rotateScale) - parseInt(styNum);
  }
  
  document.getElementById('toRotate').style.transform = "rotate(" + calAmount + "deg)";

  //console.log(calAmount);
  //console.log(lineStyle.replace(/[^0-9]/g, ''));
}

.mydiv {
  background-color: blue;
  width: 150px;
  height: 150px;
  float: left;
  color: #ffffff;
}

#rotateButton {
  width: 80px;
  height: 60px;
  float: left;
}

Rotate Right<input type="radio" checked name="rotate" value="right"> Rotate Left<input type="radio" name="rotate" value="left">
<br/><br/>
<input type="text" id="rotatescale" value="45">
<br/>
<br/>
<div style="transform:rotate(0deg)" id="toRotate" class="mydiv">My Div</div>
<button onclick="rotateMe();" id="rotateButton" type="button">rotate</button>

const rotation = '--rotation';
const toRotate = document.querySelector('#toRotate');

function rotateMe() {
  const rotate = parseInt(getComputedStyle(toRotate).getPropertyValue(rotation));
  toRotate.style.setProperty(rotation, `${rotate + 45}deg`);
}

.mydiv {
  background-color: blue;
  width: 150px;
  height: 150px;
  float: left;
  color: #ffffff;
  --rotation: 45deg;
  transform: rotate(var(--rotation));
}

#rotateButton {
  width: 80px;
  height: 60px;
  float: left;
}

<div id="toRotate" class="mydiv">My Div</div>
<button onclick="rotateMe();" id="rotateButton" type="button">rotate</button>

<script>
function rotateMe() {

  //add .transform
  var lineStyle = document.getElementById('toRotate').style.transform;
  
  var styNum = lineStyle.replace(/[^0-9]/g, '');
  
  // add parseInt
  var calAmount = parseInt(styNum) + 45;
  document.getElementById('toRotate').style.transform = "rotate(" + calAmount + "deg)";
;
}
</script>