現在、下記コード・添付画像のような、ユーザー情報を入力してもらうポップアップを作っています。

<template>
      <v-btn class="create-button" color="yellow" @click="alertDisplay">Create</v-btn>

    <br/>

    <p>Test result of createCustomer: {{ createdCustomer }}</p>
  </div>
</template>

<script>
  export default {
    data() {
      return {
        createdCustomer: null
      }
    },
    methods: {
      async alertDisplay() {

        const {value: formValues} = await this.$swal.fire({
            title: 'Create private customer',
            html: '<input id="swal-input1" class="swal2-input" placeholder="Customer Number">' +
                '<select id="swal-input2" class="swal2-input"> <option value="fi_FI">fi_FI</option> <option value="sv_SE">sv_SE</option> </select>'
                 + 
                '<input id="swal-input3" class="swal2-input" placeholder="regNo">' +
                '<input v-model="createdCustomer.address.street" id="swal-input4" class="swal2-input" placeholder="Address (street)">' +
                '<input v-model="createdCustomer.address.city" id="swal-input5" class="swal2-input" placeholder="Address (city)">' +
                '<input v-model="createdCustomer.address.country" id="swal-input6" class="swal2-input" placeholder="Address (country)">' +
                '<input v-model="createdCustomer.address.region" id="swal-input7" class="swal2-input" placeholder="Address (region)">' +
                '<input v-model="createdCustomer.address.zipCode" id="swal-input8" class="swal2-input" placeholder="Address (zipCode)">' +
                '<input id="swal-input9" class="swal2-input" placeholder="First Name">' +
                '<input id="swal-input10" class="swal2-input" placeholder="Last Name">'
                ,
            focusConfirm: false,
            preConfirm: () => {
                return [
                    document.getElementById('swal-input1').value,
                    document.getElementById('swal-input2').value,
                    document.getElementById('swal-input3').value,
                    document.getElementById('swal-input4').value,
                    document.getElementById('swal-input5').value,
                    document.getElementById('swal-input6').value,
                    document.getElementById('swal-input7').value,
                    document.getElementById('swal-input8').value,
                    document.getElementById('swal-input9').value,
                    document.getElementById('swal-input10').value
                ]    

            }
        })
        if (formValues) {
            this.createdCustomer = formValues;
            console.log('the content of this.createdCustomer');
            console.log(this.createdCustomer);
            console.log('the content of this.createdCustomer.address');
            console.log(this.createdCustomer.address);
        }   
      }
  }
</script>

multiple inputs

ただ複数の項目を入力してもらう事だけなら今のコードのままでもできるのですが、「アドレス(住所)」の部分に関しては単なる「文字列」ではなく、下記コードのような複数の文字列からなる「オブジェクト型」として保存したいです。

"address": {
    "street": "string",
    "city": "string",
    "country": "string",
    "region": "string",
    "zipCode": "string"
}

今の所、HTMLとpreConfirm parametersを使って入力項目をポップアップ内に表示させているのですが、上記のようなオブジェクト型でユーザーのアドレス(住所)を保存したい場合、どのようにすれば良いのでしょうか?