get colum content

column.js

function copyToClipboard(text) {
    if (window.clipboardData) { // Internet Explorer
        window.clipboardData.setData("Text", text);
    } else {  
        unsafeWindow.netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");  
        const clipboardHelper = Components.classes["@mozilla.org/widget/clipboardhelper;1"].getService(Components.interfaces.nsIClipboardHelper);  
        clipboardHelper.copyString(text);
    }
}
function copyTextToClipboard(text) {
  var textArea = document.createElement("textarea");
  textArea.style.position = 'fixed';
  textArea.style.top = 0;
  textArea.style.left = 0;
  textArea.style.width = '2em';
  textArea.style.height = '2em';
  textArea.style.padding = 0;
  textArea.style.border = 'none';
  textArea.style.outline = 'none';
  textArea.style.boxShadow = 'none';
  textArea.style.background = 'transparent';
  textArea.value = text;
  document.body.appendChild(textArea);
  textArea.select();
  try {
    var successful = document.execCommand('copy');
    var msg = successful ? 'successful' : 'unsuccessful';
    console.log('Copying text command was ' + msg);
  } catch (err) {
    console.log('Oops, unable to copy');
  }
  document.body.removeChild(textArea);
}
function getColumn(table_id, col) {
  var tab = document.getElementById(table_id);
  var n = tab.rows.length;
  var i,
  s = [],
  tr,
  td;
  // First check that col is not less then 0
  if (col < 0) {
    return null;
  }
  for (i = 0; i < n; i++) {
    tr = tab.rows[i];
    if (tr.cells.length > col) { // Check that cell exists before you try
      td = tr.cells[col]; // to access it.
      s.push(td.innerText);
    } // Here you could say else { return null; } if you want it to fail
    // when requested column is out of bounds. It depends.

  }
  return s;
}
var txt = getColumn('myTable', 0);
console.log(txt);
copyToClipboard(txt);
copyTextToClipboard(txt);
copy(txt);

column2.js

function getColumn(table_id, col) {
  var tab = document.getElementById(table_id);
  var n = tab.rows.length;
  var i,
  s = [],
  tr,
  td;
  // First check that col is not less then 0
  if (col < 0) {
    return null;
  }
  for (i = 0; i < n; i++) {
    tr = tab.rows[i];
    if (tr.cells.length > col) { // Check that cell exists before you try
      td = tr.cells[col]; // to access it.
      s.push(td.innerText);
    } // Here you could say else { return null; } if you want it to fail
    // when requested column is out of bounds. It depends.

  }
  return s;
}
var txt = getColumn('myTable', 0);
console.log(txt);
copy(txt);