fr

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

You can use this attribute with the following SVG elements:

<radialGradient>

Examples

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

Changing the value of `fr`

The following example presents two circles: the first one has fr set to 5% while the other circle has fr set to 25%.

html

<svg
  viewBox="0 0 480 200"
  width="420"
  height="160"
  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>

The focal point's relationship to `(fx, fy)`

This example has fr equal to 5% and is representing how the attributes fx and fy (the points labeled as such in the SVG) act as the origin for the focal point of the radial gradient. This focal point is a circle whose radius (the value of fr) defines when the first color stop, in this case the color red, should start transitioning into the other color stop, which in this case is the color blue.

html

<svg
  viewBox="0 0 120 120"
  width="165"
  height="165"
  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="45" cy="45" 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>

Usage notes

Value	`<length>`
Default value	`0`
Animatable	None

Specifications

Specification
Scalable Vector Graphics (SVG) 2 # RadialGradientElementFRAttribute

Browser compatibility

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