In jsfiddle they have option to set no wrap(head), no wrap(body), OnDomReady and OnLoad in left side option. In my progra
That simply means place your JavaScript between the <head> tags
From the documentation page

Reference
It just means that the script is added in the <head> section of the <html>
From JSFiddle Docs,
no wrap(head): do not wrap the JavaScript code, place it in
<head>section
Here is a demo of what you might be using (All HTML at one place).