in src/components/dropshadow-filter.js [20:34]
function DropshadowFilter() {
return (
<filter id="dropshadow" key="dropshadow" height="130%">
<feGaussianBlur in="SourceAlpha" stdDeviation="3" />
<feOffset dx="2" dy="2" result="offsetblur" />
<feComponentTransfer>
<feFuncA type="linear" slope="0.1" />
</feComponentTransfer>
<feMerge>
<feMergeNode />
<feMergeNode in="SourceGraphic" />
</feMerge>
</filter>
);
}