[Vuejs]-Vue js can't display data

Please try to move your code for example to mounted lifecycle hook:

data() {
  return {
    dataresults: [],
  };
},
mounted() {
  axios
    .get("api/getoutcome")
    .then((response) => {
      this.dataresults = response.data
    })
    .catch(function(error) {
      console.warn(error);
    });
}