getBoundingClientRect和相对位置之间的冲突

function getPosition(elementA, elementB) {
  const rectA = elementA.getBoundingClientRect();
  const rectB = elementB.getBoundingClientRect();

  const deltaX = rectB.left - rectA.left;
  const deltaY = rectB.top - rectA.top;

  return {
    x: deltaX,
    y: deltaY,
  };
}

const elementA = document.getElementById("elementA");
const elementB = document.getElementById("elementB");

const relativePosition = getPosition(elementA, elementB);
console.log(`相对位置： (${relativePosition.x}, ${relativePosition.y})`);