Web Reference: Mar 15, 2017 · If you redeclare a variable using let or const, JavaScript throws an error. However, redeclaring variables using var does not throw an exception. The latter declarations merely shadow the previous declarations. Jan 16, 2026 · When might you intentionally redeclare a variable, and does it have a place in modern codebases? This blog dives deep into variable redeclaration, exploring how it works with `var`, `let`, and `const`, practical scenarios where it might be used, and whether it’s a pattern worth embracing today. Jul 30, 2023 · Unlike “let”, it also does the same when attempting to reassign a variable to a new value. It is not the value itself that cannot be changed, but the reference to the value i.e. the name.
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