Ng-table: header-class is not working any more

Found how it works now with 5.X, have to put class between simple quotes

Example :

<table ng-table="tableParams" class="table ng-table-responsive">
        <tr ng-repeat="user in $data">
            <td sortable="'name'" header-class="'hdr'" title="'Name'">
                {{user.name}}
            </td>
            <td data-title="'Age'">
                {{user.age}}
            </td>
        </tr>
    </table>

For dynamic table use a 'class' attribute, as example below

var usernameCol = {
      title: 'Name',
      titleAlt: 'Name',
      'class': 'hdr',
      sortable: 'name',
      filter: { name: 'select' },
      filterData: names,
      show: true,
      field: 'name'
    };

Thanks for taking the time to post the answer to your own question

@jlebleu You save my day, thx