JS Foundations — Concept Checks

"JS Foundations — Concept Checks" — a set of quick, standalone quizzes to check whether you actually understand a specific JavaScript concept, one topic at a time.

• Compilers & Interpreters description
• Console I/O & Why JS
• Operators in JS
• Primitive vs Non-Primitive in JS
• var, let & const
• Hoisting & the Temporal Dead Zone
• The Loop-Closure Gotcha
• Type Coercion, Truthy/Falsy & == vs ===
• Blocks in JS
• Loops in JS
• Functions in JS
• Scope, the Scope Chain & Lexical Scope
• typeof & the Nuances of Values & Types
• Objects in JS