Question

I’m wondering how to change this exact php regex feature into javascript?

$ismatch= preg_match('|She is a <span><b>(.*)</b></span>|si', $sentence, $matchresult);

if($ismatch)
{
      $gender= $matchresult[1];
}
else{ //do other thing }

Answer 1

This is not quite trivial since JavaScript doesn’t support the s modifier.

The equivalent regex object would be

/She is a <span><b>([\s\S]*)<\/b><\/span>/i

The functionality of the code (extracting group 1 from the match if there is a match) would be done in JavaScript like this:

var myregexp = /She is a <span><b>([\s\S]*)<\/b><\/span>/i;
var match = myregexp.exec(subject);
if (match != null) {
    result = match[1];
} else {
    // do other thing
}