How can i concatenate 2 strings in node.js?

Question

var link = 'https://thisIsAlink'
var line = 'this is a line'

what i have done is

var full_path = session.send(link + line)

The output i got: https://thisIsAlink this is a line
The output i want: https://thisIsAlinkthis is a line

Answer 1

Var1 = 'this sentence'
Var2 = 'new sentence'
Var2 += Var1

This output is: new sentencethis sentence
If you want just switch the contat and you get the opposite