console.log(
"This is (my) simple text".match(/\(([^)]+)\)/)[1]
);
\(
being opening brace, (
— start of subexpression, [^)]+
— anything but closing parenthesis one or more times (you may want to replace +
with *
), )
— end of subexpression, \)
— closing brace. The match()
returns an array ["(my)","my"]
from which the second element is extracted.