How to copy height to another object in illustrator script? thanks

Quick modification. The clipping mask can be a group of paths or text in Adobe Illustrator. Then the code won't work. I didn't make it complicated. But in your example you have a mask from a simple path.

function resizeZero() {
  var aDoc = app.activeDocument;
  var zero = selection[0];
  var one = selection[1];
  var coeff = Math.abs(getHeight(one) / getHeight(zero) * 100);
  zero.resize(coeff, coeff);
  redraw();
}

function getHeight(item) {
  return (item.typename == 'GroupItem' && item.clipped) ? getMaskPath(item).height : item.height;
}

function getMaskPath(group) {
  for (var i = 0; i < group.pageItems.length; i++) {
    var item = group.pageItems[i];
    if ((item.typename === 'CompoundPathItem' && item.pathItems[0].clipping) || item.clipping) {
      return item;
    }
  }
}

resizeZero();