"<feDropShadow>"

Defines a filter primitive that creates a drop shadow effect.

• DOM object: SVGFEDropShadowElement
• SVG2 spec: https://www.w3.org/TR/filter-effects/#feDropShadowElement

Equivalent to: feGaussianBlur of SourceAlpha, offset by dx/dy, flooded with flood-color/flood-opacity, then merged under SourceGraphic.

Example usage:

<filter id="shadow">
  <feDropShadow dx="3" dy="3" stdDeviation="2" flood-color="black" flood-opacity="0.5" />
</filter>