import Jason from './some.json';
export defaults {
data(){ return { someArr: Jason } } }

npm install json-loader --save

module: {
    loaders: [
        {
            test: /.json/,
            loader: 'json',
        }
    ],
}

var yourJSONData= JSON.parse(Jason);

export default {
  "foo": "bar",
  ...
}

import Conf from './static/app-conf.json';
Vue.prototype.$appConfig = Conf;

<template>
      <div>{{someText}}</div>
    </template>
    <script>
        export default {
                name: 'Something',
                components: {},
                props: {},
                data: () => ({
                    someText: Vue.prototype.$appConfig.someText,
                }),
                computed: {},
                methods: {}
            };
    </script>