<td v-for="md in monday" @mousemove="mouseoverEvent($event, md.status )" :class="{red: md.status}" :key="md.id" :data-hours="md.minutes"> </td>
methods:{
mouseoverEvent:function(event, status){
if(event.which == 1){
return status=!status
}
}
},
@mousemove="md.status=!md.status"