I am working with Qlik Sense extension development for straight table, where I have to add sorting and searching functionality for each header (column). I have completed sorting by adding this code;

<i class="sort-icon" qva-activate="head.reverseOrder()" ng-class="{ 'icon-triangle-top': head.qSortIndicator === 'A', 'icon-triangle-bottom': head.qSortIndicator === 'D'}"></i>

But I am unable to do searching functionality, can anyone please help me to do searching functionality.