Syntax parser - a program that reads your code and determines what it does and if its grammar/syntax is valid. When you write JavaScript it isn't directly telling computer what to do. You're writing ...

i.e. intuitively it looks like the variable will only be available within the block but it is accessible outside the block .. in javascript's case, because var doesn't make a block level ...

Syntax parser - a program that reads your code and determines what it does and if its grammar/syntax is valid. When you write JavaScript it isn't directly telling computer what to do. You're writing ...

These are my notes from the briliant course by Tony Alicea about learning in-depth JavaScript. If you want to learn how JavaScript engine works under the hood I highly recommend you to check out this ...