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Episode 1: How JavaScript Works!

Execution Context​

  • Everything in JavaScript happens inside the execution context.
  • The execution context is like a big box or container where the JavaScript code is executed.
  • It consists of two components: the memory component (variable environment) and the code component (thread of execution).

Memory Component (Variable Environment)​

  • Variables and functions are stored in the memory component as key-value pairs.
  • The memory component is also known as the variable environment.

Code Component (Thread of Execution)​

  • The code component is where the JavaScript code is executed line by line.
  • It is also known as the thread of execution.

JavaScript Characteristics​

  • JavaScript is a synchronous single-threaded language.
  • Synchronous: It executes one command at a time in a specific order.
  • Single-threaded: It can only execute one command at a time.
  • It proceeds to the next line only when the current line has finished executing.

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