regex basics in JavaScript

What this snippet does

test() checks for a match; match() returns matches; replace() substitutes them — the g flag finds all, not just the first.

Expected output

true
[ 'H', 'W' ]
H*ll* W*rld
[ 'Hello', 'World' ]

Why practise typing this

Typing regex 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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