How to read json file in vue.js

I am beginner in web development. I am using vue-cli3.0 and local server.

<template>
    <div>
    </div>
</template>

<script lang="ts">
import { Component, Prop, Vue } from 'vue-property-decorator';

@Component({
  components: {
  },
})

export default class Test extends Vue 
{
  mounted(){
      this.readJson("./resources/doc.json")
  }

    readJson(filePath) {
        var request = new XMLHttpRequest();
        request.open("GET",filePath, false);
        console.log(request)
        // request.send(null)
        // var my_JSON_object = JSON.parse(request.responseText);
        // alert (my_JSON_object.result[0]);
    }
}
</script>

When I console.log(request) , inside of request is like this.

XMLHttpRequest {onreadystatechange: null, readyState: 1, timeout: 0, withCredentials: false, upload: XMLHttpRequestUpload, …} onabort: null onerror: null onload: null onloadend: null onloadstart: null onprogress: null onreadystatechange: null ontimeout: null readyState: 1 response: "" responseText: "" responseType: "" responseURL: "" responseXML: null status: 0 statusText: "" timeout: 0 upload: XMLHttpRequestUpload {onloadstart: null, onprogress: null, onabort: null, onerror: null, onload: null, …} withCredentials: false proto: XMLHttpRequest

They are all null.

Please help me.

I can't write import here.

So I don't want to use import.

Thank you for a answer.

<template>
    <div>
    </div>
</template>

<script lang="ts">
import { Component, Prop, Vue } from 'vue-property-decorator';

@Component({
  components: {
  },
})

export default class Test extends Vue 
{
  mounted(){
      this.readJson(require("./resources/doc.json"))
  }

    readJson(filePath) {
        var request = new XMLHttpRequest();
        request.open("GET",filePath, false);
        console.log(request)
        request.send(null)
        var my_JSON_object = JSON.parse(request.responseText);
        alert (my_JSON_object.result[0]);
    }
}
</script>

I changed my code like this.

But inside request is still same.

error

vue.runtime.esm.js?2b0e:587 [Vue warn]: Error in mounted hook: "SyntaxError: Unexpected token < in JSON at position 0"

But I found that inside "filePath.ngldoc" there were data! Is this data javascript object?