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A block is simply any code wrapped in curly braces { } . In JavaScript, you can use block scope and the let keyword to your advantage by defining variables that are only available to a block rather than polluting the global scope. Let’s look at two examples: const dateStr = '2020-05-04' ; var [ year , month , day ] = dateStr . split ( '-' ) ; // 'year' accidently gets redefined on the global scope…
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