检查渐变是否太亮javascript

const element = document.getElementById('gradientElement');
const computedStyle = window.getComputedStyle(element);
const gradientValue = computedStyle.getPropertyValue('background-image');

const gradientColors = gradientValue.match(/rgba?\([^)]+\)/g);

const getBrightness = (color) => {
  const rgb = color.match(/\d+/g);
  const brightness = (rgb[0] * 299 + rgb[1] * 587 + rgb[2] * 114) / 1000;
  return brightness;
};

const brightnessValues = gradientColors.map((color) => getBrightness(color));

const threshold = 200; // 设置亮度阈值
const isTooBright = brightnessValues.some((brightness) => brightness > threshold);

if (isTooBright) {
  console.log('渐变太亮了！');
} else {
  console.log('渐变正常。');
}