nuxt-get-data-on-render.js

// store/index.js
const createStore = () => {
    return new Vuex.Store({
        state: {
            counter: 0,
            repos: []
        },
        actions: {
            LOAD_REPOS: function({ commit }) {
                axios.get('url').then((res) => {
                    commit('SET_REPOS', res.data)
                })
            }
        },
        mutations: {
            SET_REPOS: (state, repos) => {
                state.repos = repos
            },
            increment(state) {
                state.counter++
            }
        }
    })
}

// pages/index.vue
<script>
import { mapState } from 'vuex'

export default {
    fetch ({ store }) {
        store.dispatch('LOAD_REPOS')
    },
    computed: mapState([
        'counter',
        'repos'
    ]),
    methods: {
        increment () {
            this.$store.commit('increment')
        }
    }
}
</script>