how javascript code is executed + call stack

so when javascript code is compile then
there are is global execution context -> which is shown by this keyword

global execution context has
two phases
1. Memory phase
2. Execution phase

in memory phase all the variables are defined and function definition is store

afte the memory phase is defined then execution phase start
in which the actual operation start

see hitesh video to understand the eg.

and call stack is similar to other languages like java and c