Get surveyjs questions from db

I am using surveyjs in vue, and I am trying to get my var json questions from my API.

Using vue-resource, I make a GET request to the API, and save the response in questions and put it on var json

export default {
    components: {
           Survey
    },
    data(){
           this.$http.get('api')
           .then(res => res.json())
           .then(questions => {
               this.questions = questions;
           });
           var json = this.questions;
           var model = new SurveyVue.Model(json);
           return {
               survey: model,
               questions:''
           }
    }
}

Using console.log(json), I get undefined. So, what´s the correct way to access API response in this case?

I think you could use something like this :

export default {
    components: {
           Survey
    },
    data() {
        return {
            survey: {},
            questions: ''
        }
    },
    mounted() {
        let self = this;
        this.$http.get('api')
           .then(questions => {
               self.questions = questions;
           });
        this.survey = new SurveyVue.Model(this.questions);
    }
}

You can learn more about the mounted method here. You now should be able to access your survey data.