I have a custom dropdown component in each header cell of ngx-datatable

Question

I have custom dropdown component in each header cell of ngx-datatable. But when I click at dropdown the it is going inside ngx-datatable body. How can I fix the issue please help me.

I am using angular 4.0 and typescript 2.4.

Screen shot:

Here is my code:

 <div>
      <ngx-datatable style="height:450px;"
        class='material'
        [rows]='activeTabData | filtermanual:propKey:propValue | orderBy : {property: column, direction: direction}'
        [columnMode]="'force'"
        [headerHeight]="height"
        [rowHeight]="getRowHeight"
        [scrollbarV]="true"
        [scrollbarH]="true"
        [loadingIndicator]="loadingIndicator"
        [rowClass]="getRowClass"
        (page)="onPage($event)">
      <div>
        <ngx-datatable-column 
          [width]="50"
          [frozenLeft]="true">
            <ng-template let-row="row" let-value="value" ngx-datatable-cell-template >
              <input type="checkbox" 
              (ngModelChange)="checkButtonState($event, row)"
              [ngModel]="row.status"
              >
          </ng-template>
        </ngx-datatable-column>

        <ul>
          <li *ngFor="let col of tableKeys; let i=index; let last = last" >
        <ngx-datatable-column name={{col}} width="230" [resizeable]="true">
          <ng-template let-column="column" ngx-datatable-header-template >
              <div class="draggable" style="height:30px;width:160px;background:transparent;z-index:1000;position:relative;cursor:pointer;"></div>

                                    <ng2-multiselect 
                                      [options]="dropdowns[col]"
                                      [loading]="isLoading"
                                      [(ngModel)]="multiModels[col]"
                                      [texts]="{'defaultTitle':col}"
                                      (dropdownOpen)="dropdownOpen()"
                                      (dropdownClosed)="dropdownClosed(col)"
                                      >
                                    </ng2-multiselect>   
        </ng-template>

          <ng-template let-row="row" let-value="value" ngx-datatable-cell-template >
              <i [innerHTML]="row[col]"></i>
          </ng-template>
        </ngx-datatable-column>

          </li>
        </ul>
      </div>
      </ngx-datatable>
    </div>

Answer 1

For ngbDropdown dropdown, I resolved the similer issue by adding the container="body" atrribute as below:

<div ngbDropdown class="d-inline-block" container="body">
....
.....
</div>