Finding all variables in a function

[csdude55]

For the sake of debugging, I thought it might help to see every variable that's set within or sent to a function. This will let me see what's changed from one run to another.

I'm using this:

for (let variable in window) {
 if (window.hasOwnProperty(variable))
  console.log(variable + ' -> ' + window[variable]);
}

but it returns about 1000 variables! Most of which are really functions that aren't helpful at all (like "onblur" and "onclick").

Is there a way to narrow this down to something more usable?