Regular Expressions 101

Group 1([{,]\s*?"[^"]+"\s*:)

Character Class[{,]

{the literal { (123₁₀ / 173₈ / 7B₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\s*?a Unicode whitespace character, repeated any number of times

"the literal " (34₁₀ / 42₈ / 22₁₆)

Negated Character Class[^"]+

+matches at least one character outside the set below:

"the literal " (34₁₀ / 42₈ / 22₁₆)

\s*a Unicode whitespace character, repeated any number of times

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\s*a Unicode whitespace character, repeated any number of times

,the literal , (44₁₀ / 54₈ / 2C₁₆)

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.

Search reference

Regular Expression

([{,]\s*?"[^"]+"\s*:)\s*,

New

{'body': '{"A":"a", "B":, "C": "c"}}'
{'body': '{"A":"a", "B": , "C": "c"}}'
{'body': '{"A":"a", "B":  , "C": "c"}}'
{'body': '{"A":"a", "B": ": ,", "C": "c"}}'

Substitution

\1 null,