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/g Case-insensitive /i Multiline /m and more.^(\w+[.-]?)*\w+@\w+([.-]?\w+)*(\.\w{2,3})+$Matches most standard email formats, e.g. john.doe@example.com.
#?([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})Captures 3- or 6-digit hex colors like #ff5733 or #123.
^(\(\d{3}\)|\d{3})[- ]?\d{3}[- ]?\d{4}$Accepts formats like (123) 456-7890 or 555-123-4567.
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