1. edit app.js

2. after vue initialization ( app variable) add this global filter

app.config.globalProperties.$filters = {
    formatNumber(number) {
        return number.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ".");
    }
}

3. then in any component use this filter

 <span class="text-success">{{ $filters.formatNumber(this.bigNumber) }} </span>