What is the Call Stack?

The JavaScript engine uses a stack to keep track of all the execution contexts.
A call stack is also known as an 'Execution Context Stack', 'Runtime Stack', or 'Machine Stack'.
It uses the LIFO principle (Last-In-First-Out). When the engine first starts executing the script, it creates a global context and pushes it on the stack. Whenever a function is invoked, the JS engine creates a function stack context for the function pushes it to the top of the call stack and starts executing it.
When execution of the current function is complete, then the JavaScript engine will automatically pop the context from the call stack and it goes back to its parent.

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What is the Call Stack?

The JavaScript engine uses a stack to keep track of all the execution contexts.
A call stack is also known as an 'Execution Context Stack', 'Runtime Stack', or 'Machine Stack'.
It uses the LIFO principle (Last-In-First-Out). When the engine first starts executing the script, it creates a global context and pushes it on the stack. Whenever a function is invoked, the JS engine creates a function stack context for the function pushes it to the top of the call stack and starts executing it.
When execution of the current function is complete, then the JavaScript engine will automatically pop the context from the call stack and it goes back to its parent.