Try the suggestion from this stackoverflow thread.

For your CSS

thead, tbody { display: block; }

tbody {
    height: 100px;       /* Just for the demo          */
    overflow-y: auto;    /* Trigger vertical scroll    */
    overflow-x: hidden;  /* Hide the horizontal scroll */
}

And for your JS

$(document).ready(function () {
  
  // Change the selector if needed
var $table = $('table.itemTable'),
    $bodyCells = $table.find('tbody tr:first').children(),
    colWidth;

// Adjust the width of thead cells when window resizes
$(window).resize(function() {
    // Get the tbody columns width array
    colWidth = $bodyCells.map(function() {
        return $(this).width();
    }).get();
    
    // Set the width of thead columns
    $table.find('thead tr').children().each(function(i, v) {
        $(v).width(colWidth[i]);
    });    
}).resize(); // Trigger resize handler
  
});

Your table can keep the class name itemTable.