<feDropShadow> - SVG: Scalable Vector Graphics 编辑

The SVG <feDropShadow> filter primitive creates a drop shadow of the input image. It can only be used inside a <filter> element.

The drop shadow color and opacity can be changed by using the flood-color and flood-opacity presentation attributes.

html,body,svg { height:100% }

<svg viewBox="0 0 30 10" xmlns="http://www.w3.org/2000/svg">
  <defs>
    <filter id="shadow">
      <feDropShadow dx="0.2" dy="0.4" stdDeviation="0.2"/>
    </filter>
    <filter id="shadow2">
      <feDropShadow dx="0" dy="0" stdDeviation="0.5"
          flood-color="cyan"/>
    </filter>
    <filter id="shadow3">
      <feDropShadow dx="-0.8" dy="-0.8" stdDeviation="0"
          flood-color="pink" flood-opacity="0.5"/>
    </filter>
  </defs>

  <circle cx="5" cy="50%" r="4"
      style="fill:pink; filter:url(#shadow);"/>

  <circle cx="15" cy="50%" r="4"
      style="fill:pink; filter:url(#shadow2);"/>

  <circle cx="25" cy="50%" r="4"
      style="fill:pink; filter:url(#shadow3);"/>
</svg>

Attributes

dx

This attribute defines the x offset of the drop shadow.
Value type: <number>; Default value: 2; Animatable: yes

dy

This attribute defines the y offset of the drop shadow.
Value type: <number>; Default value: 2; Animatable: yes

stdDeviation

This attribute defines the standard deviation for the blur operation in the drop shadow.
Value type: <number>; Default value: 2; Animatable: yes

Global attributes

Core Attributes

Most notably: id

Styling Attributes

class, style

Filter primitive attributes

height, in, result, x, y, width

Presentation Attributes

Most notably: flood-color, flood-opacity

Usage notes

Specifications

Browser compatibility

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