import moment from ‘moment’;
Import Vue from ‘vue’;

Object.defineProperty(Vue.prototype, ‘$moment’, {
    get() { return this.moment; }
});

new Vue({
    data: {
       moment: moment
    }
})

Vue.component(‘my-component’, {
    …
    computed: {
        currentTime() {
            return this.$moment();
        }
    }
}