Static Properties of RegExp Object II
RegExp.multiline if true, search through newlines
RegExp.$` or RegExp.leftContext is part of searched string before matched part
RegExp.$& or RegExp.lastMatch is part of searched string that is matched to by regular expression
RegExp.$’ or RegExp.rightContext is part of searched string after matched part
So String searched is RegExp.leftContext + RegExp.lastMatch + RegExp.rightContext
RegExp.lastParen The last parenthesized substring match, if any
RegExp.$1,$2 .. $9 are the first through ninth parenthesized expressions matched