How to combine regex and string in javascript?

Question

If I have this hardcoded regex

/^ *\d+(?:\.\d+)+ *Country/

How can I change it so that Country comes from a string variable, and another variable would be /^ *\d+(?:\.\d+)+ */, then somehow concatenate it so it becomes

/^ *\d+(?:\.\d+)+ *Country/

?

Thanks

Answer 1

Maybe this helps

 var re = new RegExp('^ *\\d+(?:\\.\\d+)+ *'+  country);