What this snippet does
Spreading a string creates an array of its characters — combine with Set to get unique characters instantly.
Expected output
[ 'h', 'e', 'l', 'l', 'o' ] [ 'm', 'i', 's', 'p' ] misp
Why practise typing this
Typing spread code builds muscle memory for the symbols and indentation JavaScript uses most, which prose-based typing tests never cover. DevType measures your words per minute and accuracy on this snippet and tracks the individual characters you mistype, so later lessons can target them.
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