javascript - replace a portion of xml using xpath and xmldom in node.js -

i have huge xml structure have attached below,

i adding update details , adding data product tracking module when try change it replacing entire xml new xml sample xml

<query_by_gtin_response:querybygtinresponse xmlns:query_by_gtin_response="urn:gs1:tsd:query_by_gtin_response:xsd:1" xmlns:xsi="http://www.w3.org/2001/xmlschema-instance" xsi:schemalocation="urn:gs1:tsd:query_by_gtin_response:xsd:1 querybygtinresponse.xsd urn:gs1:tsd:basic_product_information_module:xsd:1 basicproductinformationmodule.xsd urn:gs1:tsd:nutritional_product_information_module:xsd:1 nutritionalproductinformationmodule.xsd">   <productdata>     <gtin>00000000000509</gtin>     <targetmarket>124</targetmarket>     <informationprovidergln>1111111133333</informationprovidergln>     <informationprovidername>testsub</informationprovidername>     <productdatarecord>       <module>         <bpi:basicproductinformationmodule xmlns:bpi="urn:gs1:tsd:basic_product_information_module:xsd:1">           <productname languagecode="en">waka waka</productname>           <brandnameinformation>             <brandname>wowozella</brandname>           </brandnameinformation>         </bpi:basicproductinformationmodule>       </module>       <module>         <nfii:nonfoodingredientinformationmodule xmlns:nfii="urn:gs1:tsd:nonfood_ingredient_information_module:xsd:1"/>       </module>       <module>         <product_tracking_information_module>           <variantid>ec9ef090-57c2-11e6-bc2b-51c4bf71f613</variantid>           <status/>           <name>admin@gmail.com</name>           <createdby>552f5b90b348147e03e49b62</createdby>           <createddate>2016-08-01t08:35:38.648z</createddate>           <updatedby>552f5b90b348147e03e49b62</updatedby>           <updateddate>2016-08-01t08:35:38.648z</updateddate>           <applicationid>webapp</applicationid>           <history>             <createddate>2016-08-01t08:35:38.648z</createddate>             <updateddate>2016-08-01t08:35:38.648z</updateddate>             <status/>             <updatedby>552f5b90b348147e03e49b62</updatedby>             <createdby>552f5b90b348147e03e49b62</createdby>             <applicationid>webapp</applicationid>             <name>admin@gmail.com</name>           </history>         </product_tracking_information_module>       </module>     </productdatarecord>   </productdata> </query_by_gtin_response:querybygtinresponse> 

the sample xml want replace current full data in product_tracking_information_module below

<product_tracking_information_module>   <variantid>ec9ef090-57c2-11e6-bc2b-51c4bf71f613</variantid>   <status>deleted</status>   <name>gs1canada</name>   <createdby>552f5b90b348147e03e49b62</createdby>   <createddate>2016-08-01t08:35:38.648z</createddate>   <updatedby>company id 552f5b62b348147e03e49b61</updatedby>   <updateddate>2016-08-01t14:52:23.985z</updateddate>   <applicationid>serverlet</applicationid>   <history>     <createddate>2016-08-01t08:35:38.648z</createddate>     <updateddate>2016-08-01t08:35:38.648z</updateddate>     <status/>     <updatedby>552f5b90b348147e03e49b62</updatedby>     <createdby>552f5b90b348147e03e49b62</createdby>     <applicationid>webapp</applicationid>     <name>admin@gmail.com</name>   </history>   <history status="deleted">     <applicationid/>     <updatedby>company id 552f5b62b348147e03e49b61</updatedby>     <updateddate>2016-08-01t14:52:23.985z</updateddate>     <name>gs1canada</name>   </history> </product_tracking_information_module> 

and code that, doc xmldom parsed document var ptimdom = new dom().parsefromstring(ptimxml.tostring()); var nodesptim = xpath.select("//productdata//productdatarecord//module//product_tracking_information_module", doc); doc.replacechild(ptimdom,nodesptim[0]);

but result doc after second xml , full data lost.

what doing wrong?

try nodesptim[0].parentnode.replacechild(ptimdom, nodesptim[0]), call replacechild method on parentnode of element want replace.