SVGFEDistantLightElement: elevation 属性

<svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg">
  <defs>
    <filter id="lightingFilter">
      <feDistantLight azimuth="45" elevation="30" />
      <feDiffuseLighting result="light" lighting-color="white" surfaceScale="2">
        <feDistantLight azimuth="45" elevation="30" />
      </feDiffuseLighting>
    </filter>
  </defs>
  <rect
    x="50"
    y="50"
    width="100"
    height="100"
    fill="yellow"
    filter="url(#lightingFilter)" />
</svg>

const distantLight = document.querySelector("feDistantLight");

console.log(distantLight.elevation.baseVal); // Output: 30