These are examples of indicators that, taken together, helps determine how in-depth your knowledge is. I imagine that if you work with JS on a more than surface

These are examples of indicators that, taken together, helps determine how in-depth your knowledge is. I imagine that if you work with JS on a more than surface level, you'd eventually be curious about or be forced to understand how things actually work to be able to precisely control your program outcomes. It could be very important. Like the difference between something running at the right time or not.