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Center the Mouse cursor inside the circle

I’m Having trouble to center the default mouse cursor inside a circle that follows the mouse cursor

here is codepen Demo

see this image

enter image description here

// Create an html element and append to body

const dpkCursor = document.createElement("div");
dpkCursor.classList.add("dpkCursor");
document.body.appendChild(dpkCursor);

// Fuction that create circle to follow the cursor

function initCursor(speedOption = 0.25) {
  
    let dpkCursorMouse = { x: -100, y: -100 };
    let dpkCursorPos = { x: 0, y: 0 };
    let speed = speedOption;
   

    window.addEventListener("mousemove", (e) => {
      dpkCursorMouse.x = e.x;
      dpkCursorMouse.y = e.y;
    });

    const updatePosition = () => {
      dpkCursorPos.x += (dpkCursorMouse.x - dpkCursorPos.x) * speed;
      dpkCursorPos.y += (dpkCursorMouse.y - dpkCursorPos.y) * speed;
      
               
      dpkCursor.style.transform = `translate(${dpkCursorPos.x}px ,${dpkCursorPos.y}px)`;
    
    };

    function loop() {
      updatePosition();
      requestAnimationFrame(loop);
    }
    requestAnimationFrame(loop);
  
}

initCursor()

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Answer

Simply remove 50% from each side using

dpkCursor.style.transform = `translate(calc(${dpkCursorPos.x}px - 50%) ,calc(${dpkCursorPos.y}px - 50%))`;

const dpkCursor = document.createElement("div");
dpkCursor.classList.add("dpkCursor");
document.body.appendChild(dpkCursor);


function initCursor(speedOption = 0.25) {
  
    let dpkCursorMouse = { x: -100, y: -100 };
    let dpkCursorPos = { x: 0, y: 0 };
    let speed = speedOption;
   
    //center the circle around cursor       
 
    window.addEventListener("mousemove", (e) => {
      dpkCursorMouse.x = e.x;
      dpkCursorMouse.y = e.y;
    });

    const updatePosition = () => {
      dpkCursorPos.x += (dpkCursorMouse.x - dpkCursorPos.x) * speed;
      dpkCursorPos.y += (dpkCursorMouse.y - dpkCursorPos.y) * speed;

      dpkCursor.style.transform = `translate3d(calc(${dpkCursorPos.x}px - 50%) ,calc(${dpkCursorPos.y}px - 50%),0)`;
    
    };

    function loop() {
      updatePosition();
      requestAnimationFrame(loop);
    }
    requestAnimationFrame(loop);
  
}


initCursor()
body{
  background:black;
}

.dpkCursor {
  height: 1.75rem;
  width: 1.75rem;
  position: fixed;
  
  top: 0;
  left: 0;
  color: white;
  border: 2px solid #fff;
  mix-blend-mode: difference;
  border-radius: 50%;
  pointer-events: none;
  z-index: 999;
}
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