When we have a bug it is much prettier to put something like '^' (without quotes) in the end of line and gain debug output about every expression on this line (mostly it'll be a result of single expression).
Example:
const a = 1 + 2;^
const b = {^
c: 12,
d: "thirteen",
};
const [e, f] = [14, 15];^
Debug output should be like this:
'a: 3
b: {c:12, d:"thirteen"}
e: 14, f: 15'
And it is much more simple and nice to insert and delete '^' during debugging than insert and delete something long and annoying like 'console.log' and cover the expression in parentheses.