TypeError xxx is not a function Might Be A Missing Semi-Colon

When you get something like this:

TypeError: "output.jpg" is not a function

The problem might be a missing semi-colon at the end of the line defining a variable.

For example, this:

const output_tmp_path = "output.jpg"

when you need this

const output_tmp_path = "output.jpg";

TODO: Figure out which version of javascript requires the semi-colons and which one doesn't.