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Dev.to
7/22/2026
From Variables to Closures

From Variables to Closures

Short summary

A beginner-friendly JavaScript tutorial covering variables (var, let, const), hoisting, lexical scope, execution context, call stack, closures, this binding, and DRY/KISS principles. Each concept is explained with simple code examples. The article is part of a week-by-week JavaScript fundamentals series.

  • •Covers var/let/const, hoisting, closures, and execution context with examples
  • •Explains lexical scope and scope chain for beginners
  • •Includes DRY and KISS clean-code principles

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