range slider for numeric fields about jsgrid HOT 4 OPEN

fieldObj.filterTemplate = function () {
  // hidden input to handle jsGrid hardcoded filterControl property
  var $hidden = $('<input>', { type: 'hidden' })
  var setValue = function () {
    $hidden.val('[' + $min.val() + '>>' + $max.val() + ']')
  }
  this.filterControl = $hidden
  // inputs for min and max values
  var $min = $('<input>', {
    change: setValue,
    type: 'tel'
  })
  var $max = $('<input>', {
    change: setValue,
    type: 'tel'
  })
  return $('<div>', { html: [ $min, $max ] })
}