Web Reference: Hoisting is JavaScript's default behavior of moving all declarations to the top of the current scope (to the top of the current script or the current function). Variables defined with let and const are hoisted to the top of the block, but not initialized. Jan 15, 2026 · Hoisting refers to the behavior where JavaScript moves the declarations of variables, functions, and classes to the top of their scope during the compilation phase. Now coming back to the point - hoisting , scope and TDZ is quite important for mastering the fundamentals and let me tell you - most of the output based interview question comes from these topic...
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