^start of line
\s*any whitespace character, repeated any number of times
atthe literal text at (case sensitive) \sany whitespace character
*repeats the group contents below any number of times:
Negative Lookahead(?!webpack:) webpack:the literal text webpack: (case sensitive) .any character (except for line terminators)
:the literal : (5810 / 728 / 3A16)
\d+a digit, repeated at least once
:the literal : (5810 / 728 / 3A16)
\d+a digit, repeated at least once
*matches any number of characters from the set below:
\sany whitespace character
\)the literal ) (4110 / 518 / 2916)
\na line-feed (newline) character (ASCII 10)
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