[html] HTML table with 100% width, with vertical scroll inside tbody

Try this jsfiddle. This is using jQuery and made from Hashem Qolami's answer. At first, make a regular table then make it scrollable.

const makeScrollableTable = function (tableSelector, tbodyHeight) {
  let $table = $(tableSelector);
  let $bodyCells = $table.find('tbody tr:first').children();
  let $headCells = $table.find('thead tr:first').children();
  let headColWidth = 0;
  let bodyColWidth = 0;
  
  headColWidth = $headCells.map(function () {
    return $(this).outerWidth();
  }).get();
  bodyColWidth = $bodyCells.map(function () {
    return $(this).outerWidth();
  }).get();

  $table.find('thead tr').children().each(function (i, v) {
    $(v).css("width", headColWidth[i]+"px");
    $(v).css("min-width", headColWidth[i]+"px");
    $(v).css("max-width", headColWidth[i]+"px");
  });
  $table.find('tbody tr').children().each(function (i, v) {
    $(v).css("width", bodyColWidth[i]+"px");
    $(v).css("min-width", bodyColWidth[i]+"px");
    $(v).css("max-width", bodyColWidth[i]+"px");
  });

  $table.find('thead').css("display", "block");
  $table.find('tbody').css("display", "block");

  $table.find('tbody').css("height", tbodyHeight+"px");
  $table.find('tbody').css("overflow-y", "auto");
  $table.find('tbody').css("overflow-x", "hidden");
  
};

Then you can use this function as follows:

makeScrollableTable('#test-table', 250);