Bliver testdata uploadet til en server?

Nej. Al behandling foregår lokalt i din browser.

Hvad er forskellen mellem JavaScript og PCRE2?

JavaScript bruger browserens indbyggede RegExp. PCRE2 understøtter lookbehind, atomære grupper, rekursion og possessive kvantifikatorer.

JavaScript: g, i, m, s, u. PCRE2 ekstra: x, A, D.

Biblioteket tilbyder 30+ skabeloner med ét klik. De fleste er forenklede.

Ja. JavaScript: $1, $2. PCRE2: \\1, \\2 eller ${1}, ${2}.

Automatisk tilbagefald til JavaScript. Tjek netværksforbindelsen.

Regex-mønster

JSPCRE

Teststreng

Ingen match

Syntaks	Betydning	JS	PCRE	Python	Java
\d	Digit [0-9]	✅	✅	✅	✅
\D	Non-digit [^0-9]	✅	✅	✅	✅
\w	Word character [a-zA-Z0-9_]	✅	✅	✅	✅
\W	Non-word character	✅	✅	✅	✅
\s	Whitespace	✅	✅	✅	✅
\S	Non-whitespace	✅	✅	✅	✅
.	Any character (except newline)	✅	✅	✅	✅
[abc]	Character class (match a/b/c)	✅	✅	✅	✅
[^abc]	Negated class (not a/b/c)	✅	✅	✅	✅
[[:alpha:]]	POSIX alpha class	❌	✅	✅	❌
[[:digit:]]	POSIX digit class	❌	✅	✅	❌
\p{L}	Unicode letter	✅	✅	⚠️	✅
\p{N}	Unicode number	✅	✅	⚠️	✅
\X	Unicode extended grapheme cluster	❌	✅	❌	❌

Syntaks	Betydning	JS	PCRE	Python	Java
*	Zero or more	✅	✅	✅	✅
+	One or more	✅	✅	✅	✅
?	Zero or one	✅	✅	✅	✅
{n}	Exactly n times	✅	✅	✅	✅
{n,m}	Between n and m times	✅	✅	✅	✅
*?	Zero or more (lazy)	✅	✅	✅	✅
+?	One or more (lazy)	✅	✅	✅	✅
??	Zero or one (lazy)	✅	✅	✅	✅
{n,m}?	Between n and m (lazy)	✅	✅	✅	✅
*+	Zero or more (possessive)	❌	✅	❌	✅
++	One or more (possessive)	❌	✅	❌	✅
?+	Zero or one (possessive)	❌	✅	❌	✅

Syntaks	Betydning	JS	PCRE	Python	Java
^	Start of string (line start in multiline)	✅	✅	✅	✅
$	End of string (line end in multiline)	✅	✅	✅	✅
\b	Word boundary	✅	✅	✅	✅
\B	Non-word boundary	✅	✅	✅	✅
\A	Absolute start of string	❌	✅	✅	✅
\Z	Absolute end (before newline)	❌	✅	✅	✅
\z	Very end (after newline)	❌	✅	✅	❌
\G	End of previous match	❌	✅	✅	✅

Syntaks	Betydning	JS	PCRE	Python	Java
(...)	Capturing group	✅	✅	✅	✅
(?:...)	Non-capturing group	✅	✅	✅	✅
(?<name>...)	Named group (JS/Java style)	✅	⚠️	✅	✅
(?P<name>...)	Named group (Python style)	❌	✅	✅	❌
\1	Backreference to group N	✅	✅	✅	✅
$1	Replacement ref to group N	✅	❌	❌	✅
\k<name>	Named backreference	✅	✅	✅	✅
(?\|...)	Branch reset group	❌	✅	❌	❌
(?>...)	Atomic group (no backtracking)	❌	✅	❌	✅

Syntaks	Betydning	JS	PCRE	Python	Java
(?=...)	Positive lookahead	✅	✅	✅	✅
(?!...)	Negative lookahead	✅	✅	✅	✅
(?<=...)	Positive lookbehind	✅	✅	✅	✅
(?<!...)	Negative lookbehind	✅	✅	✅	✅

Syntaks	Betydning	JS	PCRE	Python	Java
(?i)	Case insensitive	✅	✅	✅	✅
(?-i)	Case sensitive	❌	✅	❌	⚠️
(?m)	Multiline (^/$ match line starts/ends)	✅	✅	✅	✅
(?s)	Dotall (. matches newline)	✅	✅	⚠️	✅
(?x)	Extended (ignore whitespace & # comments)	❌	✅	✅	✅
(?i:...)	Inline case insensitive	✅	✅	❌	✅

Syntaks	Betydning	JS	PCRE	Python	Java
\K	Reset match start	❌	✅	❌	❌
(*SKIP)	Skip current match	❌	✅	❌	❌
(*FAIL)	Force match failure	❌	✅	❌	❌
(?(cond)yes\|no)	Conditional expression	❌	✅	❌	❌
(?R)	Recurse entire pattern	❌	✅	❌	❌
(?1)	Subroutine call to group 1	❌	✅	❌	❌