如何从xml中检索特定的子节点值并与javascript中的用户输入值进行比较

Question

如何从xml中检索特定子节点值并与javascript中用户输入的值进行比较

用于从用户获取值并检查供应商名称的脚本。

有没有办法根据childnode名称进行检索？

C:\Users\ANONYMOUS>npm run compile:sass
npm ERR! path C:\Users\ANONYMOUS\package.json 
npm ERR! code ENOENT 
npm ERR! errno -4058 
npm ERR! syscall open 
npm ERR! enoent ENOENT: no such file or directory, open 'C:\Users\ANONYMOUS\package.json' 
npm ERR! enoent This is related to npm not being able to find a file. 
npm ERR! enoent 
npm ERR! A complete log of this run can be found in: 
npm ERR! C:\Users\ANONYMOUS\AppData\Roaming\npm-cache_logs\2018-06-17T05_39_21_109Z-debug.log C:\Users\ANONYMOUS>

XML文件将用户输入的值与supplierName进行比较，如果相同甚至部分打印产品pid，供应商sid和supplierName

function displayAllDetails() {

    var userProvidedValue =document.getElementById("textfield").value;

    console.log(userProvidedValue);

    var allsuppliers = [];

    var supplier = [];

    var product=[];

    var detail =[];

    var xhttp = new XMLHttpRequest();

    //Open the file

    xhttp.open("GET", "products.xml", false);

    //Send the request
    xhttp.send();

    // Read data

    var length = xhttp.responseXML.getElementsByTagName("product").length;

    product = xhttp.responseXML.getElementsByTagName("product")

    title="";

    for(var i = 0; i < length ; i++){

    var addsupplier=product[i].attributes[0].nodeValue;

    console.log(product[i].attributes[0].nodeValue); 

    for (var j = 0; j < product[i].childNodes.length; j++) {


      detail = product[i].childNodes[j];

      if(detail.contains("supplier")){

      console.log("LUCK");

      }
     console.log(detail);
    }
    console.log(addsupplier); 

  allsuppliers[i] = addsupplier;
  }  
  console.log(allsuppliers);        

}