[Vuejs]-OnChange maximum tags on two select Vuejs

You can use watch to detect a value change, here’s an example:

let foo = new Vue({
    el: '#vue-app',
    data: {
        roomTypes: @json($roomType),
        rooms: @json($rooms),
        members: @json($members),
    },
    methods: {},
    watch: {
        ['rooms.roomType']() {
            this.rooms.members = 1;
        }
    }
});