Get bounding box of SVG path - svg

Question

I want exactly what this page do
http://codepen.io/netsi1964/full/vNoemp/
I have the path and need to know it's bounding box as a rect element, it's x,y,width and height
given code
<path d="M147.5 55.8c-5.8-7.2-13.6-14.4-25.5-14.4-8.4 0-15.4 8.2-27 8.2-9 0-13-7.8-23-7.8C51.4 41.8 31 60.4 31 84.5c0 12.8 4.2 32.5 13.6 49.7C51 146.7 59.4 155 69 155c6.7 0 14.7-6.3 24.2-6.3 8.4 0 16.2 5.6 23.8 5.6 18 0 35-23.5 35-39.3 0-.8-.3-1.4-.3-2v-1c-11.8-6.3-18.2-15.7-18.2-29.3 0-11 4.8-20.5 13.6-26.7l.5-.2zm-53-8.8c13.7-4.2 26.3-14.4 26.3-32 0-1.5-.2-3.3-.4-5.3l-.2-.8C106.4 12.6 94 23.4 94 40.3c0 1.6.2 3.6.6 5.8v.8z" style="translate(0px,-212.47488403320312px) scale(1,1)" >
and know the rect properties

Answer 1

With pure JavaScript: give your path an ID and get its bounding box using getBBox().
var myPathBox = document.getElementById("myPath").getBBox();
console.log(myPathBox);
Here is a demo:
var myPathBox = document.getElementById("myPath").getBBox();
console.log(myPathBox);
<svg width="400" height="400">
<path id="myPath" d="M147.5 55.8c-5.8-7.2-13.6-14.4-25.5-14.4-8.4 0-15.4 8.2-27 8.2-9 0-13-7.8-23-7.8C51.4 41.8 31 60.4 31 84.5c0 12.8 4.2 32.5 13.6 49.7C51 146.7 59.4 155 69 155c6.7 0 14.7-6.3 24.2-6.3 8.4 0 16.2 5.6 23.8 5.6 18 0 35-23.5 35-39.3 0-.8-.3-1.4-.3-2v-1c-11.8-6.3-18.2-15.7-18.2-29.3 0-11 4.8-20.5 13.6-26.7l.5-.2zm-53-8.8c13.7-4.2 26.3-14.4 26.3-32 0-1.5-.2-3.3-.4-5.3l-.2-.8C106.4 12.6 94 23.4 94 40.3c0 1.6.2 3.6.6 5.8v.8z" style="translate(0px,-212.47488403320312px) scale(1,1)" >
</svg>

Answer 2

I know this is an old issue, but thought I would put this variant to Furtado's answer for reference here.
An easy way to get the bounding box for the path.
Make sure the path (or any other SVG element has an id on it.
Open the svg file in Chrome (or FF or probably IE).
Inspect the image
Open the console in the inspection tool.
Enter the JS: document.getElementById("myPath").getBBox(); (where
myPath is the id)
The bounding box info will be displayed in the console.
Same method, just no need for custom code.