<!DOCTYPE html>
<html>
<body>
<svg width="400" height="400">
<defs>
<filter id="filter2" x="0" y="0"
width="150%" height="150%">
<feOffset result="offOut" dx="30"
dy="30" in="SourceGraphic" id="gfg" />
<feBlend in="SourceGraphic"
in2="blurOut" mode="normal" />
</filter>
</defs>
<g>
<rect x="50" y="50" width="150"
height="150" stroke="black"
stroke-width="5" fill="gray"
filter="url(#filter2)" />
</g>
<script type="text/javascript">
var g = document.getElementById("gfg");
console.log(g.dx);
console.log("dx value is : ", g.dx.baseVal)
</script>
</svg>
</body>
</html>