Is it the last `script` element the currently running script?

Question

Is it safe to assume that the last script element* in the document when the script runs** is the currently running script?

For example, I want to create

Answer 1

I don’t think it’s a safe assumption at all, as browsers execute javascript code quite differently depending on a number of things (like if you have other script elements in the head, if they are external etc.).

You should just require people to use a dummy element with a custom id or class. That way you will also make it possible to do whatever you do multiple times a page without having to run the script multiple times.

This is also what is done when using widgets, for example Google’s +1 button.

An alternative would be to use document.write to write additional content while the script is executed. This will not replace the script tag however, but simply add something after it.