By the end of 2013 Firefox launched a tool called Black Box to their browser inspector. About a year later, Chrome did the same. If you need to carry out debugging in your code but don’t know about black boxing scripts then you should definitely give this post a read.
After a recent domain change at my workplace one of the API endpoints became inaccessible due to some configuration problems resulting in incorrect behavior in regards to cross-origin resource sharing policy. It interfered with one non-critical function of the website and was a bit of a nuisances but not big enough for back-end team to prioritize fixing it.
The arguments object is an Array-like object matching to the arguments passed to a function. The arguments object is a local variable available within all (non-arrow) functions. You can refer to a function’s arguments within the function by using the arguments object.