shouldn"t undefined errors be reported when using x in another block-level scope like this?
let
shouldn"t undefined errors be reported when using x in another block-level scope like this?
let
let x = x + 1 ? Will report an error, this is TDZ (temporary dead zone), x has been created in the block-level scope, but cannot be accessed before execution. Previous: A function of js, the basic problem of variables. Come in and have a look.
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