JSFiddle - React, Tailwind, and code Playground

JavaScript

var xmlString = "" +
     "<parent>" +
         '<sibling name="bob">' +
             "<age>4</age>" +
             "<weight>43</weight>" +
         "</sibling>" +
         '<sibling name="alex">' +
             "<age>17</age>" +
             "<weight>160</weight>" +
         "</sibling>" + 
     "</parent>";
 
 $siblings = $(xmlString).find("sibling");
 
 $siblings.each(function(){
    var name = $(this).attr("name");
    if (name == "alex")
        $(this).remove();
});

$siblings.each(function(){
    var name = $(this).attr("name");
    console.log(name);
});