在 JavaScript 中使用"let"和"var"来声明变量有什么区别?

ECMAScript 6 introduced the let statement. I've heard it described as a "local" variable, but I'm still not quite sure how it behaves differently than the var keyword.

What are the differences? When should let be used over var?

转载于:https://stackoverflow.com/questions/762011/whats-the-difference-between-using-let-and-var-to-declare-a-variable-in-jav

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csdnceshi53
Lotus@
2009/04/17 20:09
  • var
  • scope
  • let
  • javascript
  • ecmascript
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