<optionthe literal text <option (case sensitive) .*?any character (except for line terminators), repeated any number of times
\sany whitespace character
Non-Capturing Group(?:selected(?:=\"selected\")?) selectedthe literal text selected (case sensitive) Non-Capturing Group(?:=\"selected\")? ?repeats the group contents below at most once:
=the literal = (6110 / 758 / 3D16)
\"the literal " (3410 / 428 / 2216)
selectedthe literal text selected (case sensitive) \"the literal " (3410 / 428 / 2216)
\sany whitespace character
.*?any character (except for line terminators), repeated any number of times
>the literal > (6210 / 768 / 3E16)
g modifier: global. Finds all matches instead of stopping after the first