Select all / Unselect all in Bootstrap Select plugin

Use data-actions-box="true" attribute to get select all and deselect all option. Try this code

<select id="divRatings" class="selectpicker" multiple title='Choose one of the following...' data-size="5" data-selected-text-format="count>2" data-actions-box="true">
            <option value="All" selected="selected">All Ratings</option>
            <option value="EC">EC (Early Childhood)</option>
            <option value="E">E (Everyone)</option>
            <option value="E10+">E10+ (Everyone 10+)</option>
            <option value="T">T (Teen)</option>
            <option value="M">M (Mature)</option>
            <option value="AO">AO (Adults Only)</option>
        </select>

Please visit [https://silviomoreto.github.io/bootstrap-select/options/][1]

[1]: https://silviomoreto.github.io/bootstrap-select/options/ To Know more

Hope this help...

Try this select All

$('#idSelect option').attr("selected","selected");
$('#idSelect').selectpicker('refresh');

Unselect All

$('#idSelect option').attr("selected",false);
$('#idSelect').selectpicker('refresh');

for my, this worked.