With console.dir(), you can see all of Joan’s nested result, but most debugging is smaller than that. Say the total in checkRows() drifts from the 125 Joan expects, and you want to see total and donor on each pass of the loop.
In Python, you’d drop in a print() with an f-string. JavaScript’s version of that habit makes every logged value say what it is.
Label Each Value With Braces
Python’s self-documenting f-string writes each name next to its value:
total = 125
donor = "D-101"
print(f"{total=} {donor=}")
Python prints total=125 donor='D-101'. Template literals have no = form, so watch out for carrying ${total=} across. A ${} placeholder takes only an expression, and total= isn’t one, so the whole file stops with SyntaxError: Unexpected token '}'.
The JavaScript way wraps the names in braces instead. Writing { total } is object shorthand, which builds an object with a total property holding the value of total. Here’s the same check with console.log():
const total = 125;
const donor = "D-101";
console.log({ total });
console.log({ total, donor });
