regex101: JavaScript Match Workspace

Non-Capturing Group(?:\bdigit-|\s|^)

1st Alternative\bdigit-

\ban ASCII word boundary

digit-the literal text digit- (case sensitive)

2nd Alternative\s

\sany whitespace character

3rd Alternative^

^start of line

Group 1(\d{4})

\d{4}a digit, repeated exactly 4 times

Positive Lookahead(?=[.?\s]|-digit\b|$)

1st Alternative[.?\s]

Character Class[.?\s]

.the literal . (46₁₀ / 56₈ / 2E₁₆)

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

\sany whitespace character

2nd Alternative-digit\b

-digitthe literal text -digit (case sensitive)

\ban ASCII word boundary

3rd Alternative$

$end of line

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Search reference

Regular Expression

(?:\bdigit-|\s|^)(\d{4})(?=[.?\s]|-digit\b|$)

Test String
New

Lorem ipsum 3400-digit, sit amet 5000 consectetur adipisicing elit. Natus, explicabo 6700? Itaque iure  ipsum laboriosam, ex  nemo delectus iste quia cupiditate digit-9134? Iste nam digit-2456 at voluptate est 8456-digit? At excepturi quis voluptatibus 7500.

Lorem ipsum $5000  dolor sit amet consectetur adipisicing elit. Obcaecati tempora dolorum repellat reiciendis cum soluta deserunt ex voluptatibus, nam illum veniam £5550 quidem aperiam sequi, nostrum sed? Quidem eveniet maiores #5550 autem. https://codepen.io/pen/5000/3454

 follows either digit- or whitespace and is followed by either ., ?, -digit or whitespace.

Regular Expressions 101

Regular Expression

Test String
New

Substitution
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Regular Expression

Test StringNew

SubstitutionProcessing...

Test String
New

Substitution
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