fr - SVG: Scalable Vector Graphics 编辑

The fr attribute defines the radius of the focal point for the radial gradient.

Only one element is using this attribute: <radialGradient>

html, body, svg {
  height: 100%;
}

<svg viewBox="0 0 480 200" xmlns="http://www.w3.org/2000/svg">
  <defs>
    <radialGradient id="gradient1" cx="0.5" cy="0.5" r="0.5"
        fx="0.35" fy="0.35" fr="5%">
      <stop offset="0%" stop-color="white"/>
      <stop offset="100%" stop-color="darkseagreen"/>
    </radialGradient>
    <radialGradient id="gradient2" cx="0.5" cy="0.5" r="0.5"
        fx="0.35" fy="0.35" fr="25%">
      <stop offset="0%" stop-color="white"/>
      <stop offset="100%" stop-color="darkseagreen"/>
    </radialGradient>
  </defs>

  <circle cx="100" cy="100" r="100" fill="url(#gradient1)" />
  <circle cx="100" cy="100" r="100" fill="url(#gradient2)" style="transform: translateX(240px);" />
</svg>

Usage notes

Example

<svg viewBox="0 0 120 120" width="200" height="200" xmlns="http://www.w3.org/2000/svg">
  <defs>
    <radialGradient id="Gradient" cx="0.5" cy="0.5" r="0.5"
        fx="0.35" fy="0.35" fr="5%">
      <stop offset="0%" stop-color="red"/>
      <stop offset="100%" stop-color="blue"/>
    </radialGradient>
  </defs>

  <rect x="10" y="10" rx="15" ry="15" width="100" height="100"
      fill="url(#Gradient)" stroke="black" stroke-width="2"/>

  <circle cx="60" cy="60" r="50" fill="transparent" stroke="white" stroke-width="2"/>
  <circle cx="35" cy="35" r="2" fill="white" stroke="white"/>
  <circle cx="60" cy="60" r="2" fill="white" stroke="white"/>
  <text x="38" y="40" fill="white" font-family="sans-serif" font-size="10pt">(fx,fy)</text>
  <text x="63" y="63" fill="white" font-family="sans-serif" font-size="10pt">(cx,cy)</text>
</svg>

Specifications

Browser compatibility

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