Property 'form_blocks' does not exist on type 'GanttStatic'.

[septe01]

hello I'm septe.

I have isse when I want to implement multi select input in my project.

Property 'form_blocks' does not exist on type 'GanttStatic'.

how to fix it. could any one help me please

base project : react typeScript

` gantt.form_blocks['multiselect'] = { render: function(sns) { var height = (sns.height || '23') + 'px'; var html = "

"; if (sns.options) { for (var i = 0; i < sns.options.length; i++) { if (sns.unassigned_value !== undefined && sns.options[i].key == sns.unassigned_value) { continue; } html += "" + sns.options[i].label + ''; } } html += '

'; return html; },

  set_value: function(node, value, ev, sns) {
    node.style.overflow = 'visible';
    node.parentNode.style.overflow = 'visible';
    node.style.display = 'inline-block';
    var select = $(node.firstChild) as any;

    if (value) {
      value = (value + '').split(',');
      select.val(value);
    } else {
      select.val([]);
    }

    select.chosen();
    if (sns.onchange) {
      select.change(() => {
        sns.onchange.call(this);
      });
    }
    select.trigger('chosen:updated');
    select.trigger('change');
  },

  get_value: function(node, ev) {
    var value = $(node.firstChild).val();
    return value;
  },

  focus: function(node) {
    $(node.firstChild).focus();
  },
};
`

[septe01]

solved ..

Property 'form_blocks' does not exist on type 'GanttStatic