how to extract body contents using regexp [duplicate]

Answer 1

Note that the string-based answers supplied above should work in most cases. The one major advantage offered by a regex solution is that you can more easily provide for a case-insensitive match on the open/close body tags. If that is not a concern to you, then there's no major reason to use regex here.

And for the people who see HTML and regex together and throw a fit...Since you are not actually trying to parse HTML with this, it is something you can do with regular expressions. If, for some reason, content contained then it would fail, but aside from that, you have a sufficiently specific scenario that regular expressions are capable of doing what you want:

const strVal = yourStringValue; //obviously, this line can be omitted - just assign your string to the name strVal or put your string var in the pattern.exec call below 
const pattern = /]*>((.|[\n\r])*)<\/body>/im;
const array_matches = pattern.exec(strVal);

After the above executes, array_matches[1] will hold whatever came between the and tags.