Regular Expressions 101

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

data-testid=the literal text data-testid= (case sensitive)

Group 1([^\]]*?)

Negated Character Class[^\]]*?

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

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

Negative Lookahead(?!.*\[data-testid=.*?\])

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

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

data-testid=the literal text data-testid= (case sensitive)

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

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

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

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Search reference

Regular Expression

\[data-testid=([^\]]*?)\](?!.*\[data-testid=.*?\])

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