nl_tokens: Iterates over all childs of the element recreates them appends them into a document fragment which later replaces the entire body content
pl_tokens: function parse ( elementOrHtml , rules , context , cleanUp ) { wysihtml5 . lang . object ( currentRules ) . merge ( defaultRules ) . merge ( rules ) . get ( ) ; context = context || elementOrHtml . ownerDocument || document ; var fragment = <mask> . createDocumentFragment ( ) , isString = typeof ( elementOrHtml ) === "string" , element , newNode , firstChild ; if ( isString ) { element = wysihtml5 . dom . getAsDom ( elementOrHtml , context ) ; } else { element = elementOrHtml ; } while ( element . firstChild ) { firstChild = element . firstChild ; element . removeChild ( firstChild ) ; newNode = _convert ( firstChild , cleanUp ) ; if ( newNode ) { fragment . appendChild ( newNode ) ; } } // Clear element contents element . innerHTML = "" ; // Insert new DOM tree element . appendChild ( fragment ) ; return isString ? wysihtml5 . quirks . getCorrectInnerHTML ( element ) : element ; }