"<feMerge>"

Defines a filter primitive that composites multiple input layers using Source Over.

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

Each child <feMergeNode> specifies an input via its in attribute. The layers are composited bottom-to-top (first child on bottom).

Example usage:

<filter id="MyFilter">
  <feMerge>
    <feMergeNode in="blur" />
    <feMergeNode in="SourceGraphic" />
  </feMerge>
</filter>