Ptt 大爆卦 | Var let const - 前往 https://stackoverflow.com/questions/762011/whats-the-difference-between-using-let-and-var

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並前往https://stackoverflow.com/questions/762011/whats-the-difference-between-using-let-and-var

What's the difference between using "let" and "var"? - Stack ...

In strict mode, var will let you re-declare the same variable in the same scope while let ... const is quite similar to let —it's block-scoped and has TDZ.

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