Match An Html Attribute
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The goal of this expression is to match all "id" attributes of the "div" tags on a page
) . )* # Consume everything until finding " id=" or ">" # (">" is just for failing faster) \sdiv=(?P<__quote>['"])? # Consume " div=" and save the quote type (' or ") if any (?: # while (?! # next character isn't, (?(__quote) # if a quote has been opened, (?P=__quote) # the closing quote ; |[\s>] # a space or ">" else, ) ) . # consume this character )* (?(__quote) # If we got a quote (?P=__quote)| # it must be closed (?=[\s>]) # else, the attribute is ended by a space or ">" ) [^>]*> # Consume the rest of the tag
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