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Everything in JS happens inside the execution context. Imagine a sealed-off container inside which JS runs. It is an abstract concept that hold info about the env. within the current code is being executed.
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In the container the first component is memory component and the 2nd one is code component
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Memory component has all the variables and functions in key value pairs. It is also called Variable environment.
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Code component is the place where code is executed one line at a time. It is also called the Thread of Execution.
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JS is a synchronous, single-threaded language
- Synchronous:- In a specific synchronous order.
- Single-threaded:- One command at a time.
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