bulkAdd-dbInit.js

var connection  = indexedDB.open('testdb', 1);
connection.onupgradeneeded  = (e) => {
    var db = e.target.result;
    var routineStore = db.createObjectStore('contacts');
    routineStore.onerror = (evt) => {
        console.log('Contacts store could not be created.');
    };
};
var contact = {
    active: true,
    baddress: {
      line1: "Home 123/456",
      line2: "4th Street, XYZ Road",
      phone: "1234567890",
      zip: "123456",
      city: "Kochi",
      state: "Kerala"
    },
    company: "Medium Corporation",
    currency: 145,
    name: "Gautam Panickar SS",
    email: "panickarhasamail@gmail.com",
    mobile: "123456789",
    saddress: {
      line1: "Home 123/456",
      line2: "4th Street, XYZ Road",
      phone: "1234567890",
      zip: "123456",
      city: "Kochi",
      state: "Kerala"
    },
    type: 1
};
var totalLength = 1000;
var contacts = [];
for (let i = 0; i < 1250; i++) {
    const contactCopy = {...contact, id: i+1};
    contacts.push(contactCopy);
}