I set up a fiddle here:  https://jsfiddle.net/vn65g5ve/3/

1) Why is it saying add_room() is not defined? This is of course not related to the question per say

2) Why is the text in the inspector coming up as "Price", "type: " etc ? So why the double quotes? This seems to be because a text node was appended, and again not really related to the main issue, which is:

3) Why is the appended code not interpreted as HTML?

Seems like only the first part is, before the first "+"

4) If I want to separate somehow HTML and JS, how could I do this? The above code forces me to have a lot of HTML in the js file.

Thanks for any info