传递十六进制颜色(JavaScript)时出现一些问题的函数changeColor

function changeColor(hexColor) {
  // 去除前缀"#"
  hexColor = hexColor.replace("#", "");

  // 检查颜色值长度
  if (hexColor.length !== 6 && hexColor.length !== 8) {
    throw new Error("Invalid color format");
  }

  // 提取颜色值和透明度信息
  const color = hexColor.substring(0, 6);
  const alpha = hexColor.substring(6, 8);

  // 将透明度信息转换为小数形式
  const opacity = alpha ? parseInt(alpha, 16) / 255 : 1;

  // 检查颜色值是否有效
  if (!/^[0-9A-F]{6}$/i.test(color)) {
    throw new Error("Invalid color value");
  }

  // 构造rgba颜色值
  const red = parseInt(color.substring(0, 2), 16);
  const green = parseInt(color.substring(2, 4), 16);
  const blue = parseInt(color.substring(4, 6), 16);
  const rgbaColor = `rgba(${red}, ${green}, ${blue}, ${opacity})`;

  return rgbaColor;
}