html5 indexeddb table 생성

let idbFactory = indexedDB;
let dbPromise = idbFactory.open("schemaName",1);
dbPromise.onerror = (err:any) => {
    console.error("db open err",err);
};
// 호출순서:1
dbPromise.onupgradeneeded = (evt:any) => {
    // console.log("onupgradeneeded",evt.target.result);
    this.idb = evt.target.result;
    let tx:IDBTransaction = evt.target.transaction;
    let tbNameRow = "table-name-row";
    if(this.idb.objectStoreNames.contains(tbNameRow)){
        this.idb.deleteObjectStore(tbNameRow);
    }

    let dbOptRow:IDBObjectStoreParameters = {
        keyPath:"id"
        ,autoIncrement:false
    };
    let tbRow = this.idb.createObjectStore(tbNameRow,dbOptRow);
    tbRow.createIndex(`idx_${tbNameRow}_01`,["field1","field2"],{unique:true});

    useDb(this.idb);
    tx.oncomplete = function(evtTx){
        resolve(evt.target.result);
    }
};
// 호출순서:2
dbPromise.onsuccess = (evt:any) => {
    // console.log("onsuccess",evt.target.result);
    this.idb = evt.target.result;
    useDb(this.idb);
};

function useDb(idb){
    idb.onversionchange = function(event) {
        idb.close();
        console.log("A new version of this page is ready. Please reload or close this tab!");
    };
}