Call stack + Event loop
🏷️ Javascript
Javascript is a single thread language
It has a single call stack
Call stack: records function calls
Heap: allocates memory to variables and objects
Message queue: the messages in queue are response to async external events. When the call stack is empty, a message is taken out and processed. Its associated callback function will be called. When the stack is empty, the message processing ends. If an external event occurrs and no callback function is provided, the message won’t be enqueued
Event loop: check if the call stack is empty. If it is, event loop pushes the first message in the message queue to the call stack
setTimeout has 4ms minimum delay
https://developer.mozilla.org/en-US/docs/Glossary/Call_stack
https://gist.github.com/jesstelford/9a35d20a2aa044df8bf241e00d7bc2d0