nuxt.config.js

<script>
  export default {
    name: "main",
    data() {
      return {
        test: [],
        testJSPlaceHolder: [],
        errors: []
      }
    },
    methods: {
      fetchData() {
        this.$axios.$get('http://localhost:8000/api/')
          .then(response => {
            this.test.push(response)
          })
          .catch(e => {
            this.errors.push(e)
          })
      }
    }
  }
</script>

vue

<script>
  export default {
    name: "main",
    data() {
      return {
        test: [],
        testJSPlaceHolder: [],
        errors: []
      }
    },
    methods: {
      fetchData() {
        this.$axios.$get('http://localhost:8000/api/')
          .then(response => {
            this.test.push(response)
          })
          .catch(e => {
            this.errors.push(e)
          })
      }
    }
  }
</script>