nl_tokens: https : // w3c . github . io / DOM - Parsing / #dfn - fragment - parsing - algorithm
pl_tokens: <mask> parseFragment ( markup , contextElement ) { const { _parsingMode } = contextElement . _ownerDocument ; let parseAlgorithm ; if ( _parsingMode === "html" ) { parseAlgorithm = htmlParser . parseFragment ; } else if ( _parsingMode === "xml" ) { parseAlgorithm = xmlParser . parseFragment ; } // Note: HTML and XML fragment parsing algorithm already return a document fragments; no need to do steps 3 and 4 return parseAlgorithm ( markup , contextElement ) ; }