Template.addTHPDialog.events({ "tap #addButton": function(event, instance){ var max = +instance.find("#quantityInput").value; if (!max || max < 0) max = 0; TemporaryHitPoints.insert({ charId: this.charId, name: instance.find("#nameInput").value, maximum: max, deleteOnZero: !!instance.find("#deleteWhenZeroCheckbox").checked, }); } });