The original title is "Closures and Scope in JavaScript: Lexical Scope, Closures, and IIFE Explained"

Short summary

This article explains three foundational JavaScript concepts: lexical scope (where variables are accessible based on code structure), closures (functions that retain access to their parent scope after the parent finishes executing), and IIFEs (immediately-invoked function expressions that create isolated scopes). It includes code examples for each concept and shows how closures combined with IIFEs enable private data and module patterns. The content is entry-level and ends with self-promotional links to a YouTube channel.

• •Lexical scope determines variable access by where code is written, not where it runs
• •Closures let inner functions preserve parent-scope variables after the parent returns
• •IIFEs create temporary isolated scopes, useful for avoiding global namespace pollution and building modules

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