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HTMLSaved
 
<!DOCTYPE html>
<html>
  <head>
    <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
​
    <link href="https://nightly.datatables.net/css/dataTables.dataTables.css" rel="stylesheet" type="text/css" />
    <link href="https://cdn.datatables.net/rowreorder/1.5.0/css/rowReorder.dataTables.min.css" rel="stylesheet" type="text/css" />
​
    <script src="https://nightly.datatables.net/js/dataTables.js"></script>
    <script src="https://cdn.datatables.net/rowreorder/1.5.0/js/dataTables.rowReorder.js"></script>
​
    <meta charset=utf-8 />
    <title>DataTables - JS Bin</title>
  </head>
  <body>
    <div class="container">
      <button id="cancel" type="button">Cancel</button>
      <table id="example" class="display nowrap" width="100%">
        
        <thead>
          <tr>
            <th>Order</th>
            <th>Name</th>
            
          </tr>
        </thead>
​
        <tbody>
        </tbody>
      </table>
    </div>
  </body>
</html>
​
CSSSaved
 
body {
  font: 90%/1.45em "Helvetica Neue", HelveticaNeue, Verdana, Arial, Helvetica, sans-serif;
  margin: 0;
  padding: 0;
  color: #333;
  background-color: #fff;
}
​
JavaScriptSaved
 
var ajaxData;
var ajaxCopy;
​
​
var table = new DataTable('#example',{
 
  ajax: function (data, callback) {
        //some async fetch to get data
      var fetchResults = [
  {Order:1, Name: "Bob"},
  {Order:2, Name: "John"},
  {Order:3, Name: "Mark"}
];
    ajaxCopy= structuredClone (fetchResults);
   ajaxData = fetchResults;
​
            callback({ data: ajaxData }); // Pass the data to DataTables
},
  //data: ajaxData,
  columns:[
    {data:"Order"},
    {data:"Name"}
  ],
   rowReorder: {
     dataSrc: "Order",
   },
  
});
​
console.log('Start');
console.log(ajaxCopy);
​
var cancelBtn =document.getElementById("cancel");
cancelBtn.addEventListener("click",function(){
        console.log("click");
  console.log(ajaxCopy);
table.clear();
    table.rows.add(ajaxCopy).draw();
//table.rows().invalidate().draw();
});
Output 300px

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