I'd like to add "checkAll/ uncheckAll" event

<v-table :id="'dataType'+index" :columns="site.columns" :data="site.data" :options="site.options" @on-check="onCheckDevice" @on-uncheck="uncheckDevice" @on-click-row="onClickRow" >

this is the code I got, but I'd like to add 'check All' event and 'uncheck All' event. using vuejs and bootstrap right now