Difference between js syntax

Question

what are the differences in syntax between

.append("svg")

vs.

.append("svg:svg")

what are the pros and cons and what do they imply?

I am using jQuery and D3

Answer 1

Both does same function append

In XHTML code, one can use namespaces to distinguish other XML-based languages included in the webpage. Here, the namespace "svg" is used before the tag "svg".

namespace:tagname

See here

Answer 2

It's not a difference in Javascript syntax. One is appending an svg element, the other is appending a namespaced svg element.