fr

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since January 2020.

对于 <radialGradient> 元素，此属性用来定义径向渐变的焦点的半径。若该属性没有被定义，默认值为 0%。

使用说明

类别 无
值 <length>
可变性 非
规范文档 SVG 1.1 (2nd Edition): The radialGradient element

示例

html
<?xml version="1.0" standalone="no"?>

<svg width="120" height="120" version="1.1" 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>

元素

下列元素可以使用 fr 属性：

规范

Specification
Scalable Vector Graphics (SVG) 2
# RadialGradientElementFRAttribute