What is the execution context in JavaScript and how is it created?

As we delve into the intricacies of JavaScript, understanding the concept of execution context is pivotal for a Frontend Developer. At its core, the execution context is the environment that facilitates the JavaScript code to be executed by the engine. It's where our variables, functions, and expressions live and breathe, making it essential for the seamless execution of any script. Let's break down the creation and composition of an execution context to clarify its role and significance. Initially, when a JavaScript engine runs a script, it creates a Global Execution Context (GEC). This is the default or base context where all code that is not inside a function or a module is executed. The creation of the Global Execution Context marks the first phase, known as the "Creation Phase."...