<ul data-eligibleForWebStory="true"><li>Scope in JavaScript refers to the context where variables are declared and accessed.</li><li>JavaScript has Global Scope, Function/Local Scope, and Block Scope.</li><li>Global Scope allows variables to be accessible everywhere.</li><li>Function/Local Scope restricts variables declared inside a function from being accessed outside.</li><li>Block Scope, introduced in ES6, limits variables declared using let and const to the {} block.</li><li>Scope Chain in JavaScript involves searching for variables in the current scope and then traversing up the chain if not found.</li><li>Lexical Environment is a structure holding variable references created every time a function is made.</li><li>It consists of Environment Record storing variables/functions and an Outer Lexical Environment Reference pointing to the parent scope.</li><li>Inner functions can access outer variables due to Lexical Environment being defined by the location in the code.</li><li>Understanding Scope, Scope Chain, and Lexical Environment is crucial for writing clean and bug-free JavaScript code.</li></ul>

🔍 Understanding Scope, Scope Chain & Lexical Environment in JavaScript

Discover more