Regular Expressions 101

Pro

Group 1(data-key[^,\n]*,)

data-keythe literal text data-key (case sensitive)

Negated Character Class[^,\n]*

*matches any number of characters outside the set below:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\na line-feed (newline) character (ASCII 10)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

.*any character (except for line terminators), repeated any number of times

Negative Lookahead(?![\s\S]*?\nBAR)

Character Class[\s\S]*?

*?matches any number of characters from the set below:

\sany whitespace character

\Sany non-whitespace character

\na line-feed (newline) character (ASCII 10)

BARthe literal text BAR (case sensitive)

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

Detailed match information will be displayed here automatically.

25 tokens

(data-key[^,\n]*,).*(?![\s\S]*?\nBAR)

New

data-key=foo1,
data-key=foo2,
data-key=foo3,
BAR,
data-key=foo4,
asd
data-key=foo5,
asfda
data-key=foo6, foo bar

data-key=foo1,
data-key=foo2,
data-key=foo3,
BAR,
data-key=foo4,
asd
data-key=foo5,
asfda
data-key=foo6, foo bar