IndexedDB learn

gistfile1.txt

function openDB(name,callback){
  var request=window.indexedDB.open(name);
  request.onsuccess=function(e){
    myDB.db=e.target.result;
    callback();
  }
  request.onupgradeneeded=function(e){
    var store =e.target.result.createObjectStore('books',{
      keyPath:'isbn'
    });
    var titleIndex=store.createIndex('by_title','title',{
      unique:true
    });
    var authorIndex=store.createIndex('by_author','author');
    store.put({
      title:'Q',
      author:'Ab',
      isbn:123456
    });
    store.put({
      title:'A',
      author:'Ab',
      isbn:234567
    });
    store.put({
      title:'B',
      author:'Ab',
      isbn:345678
    });
  }
}

var myDB={
  name:'test',
  version:'1.0',
  db:null
}

function addDate(db){
  var transaction=db.transaction('books','readwrite');
  var store=transaction.objectStore('books');
//   var request=store.get(234567);
//   request.onsuccess=function(e){
//     console.log(e.target.result);
//   }
  
  store.add({
    title:'B',
    author:'Ab',
    isbn:222
  });
  
  //store.delete(222);
  
  store.get(222).onsuccess=function(e){
    books=e.target.result;
    books.author='aa';
    var request=store.put(books);
    request.onsuccess=function(e){
      console.log("update success");
    }
  }
}

openDB(myDB.name,function(){
  //myDB.db.close();
});

setTimeout(function(){
  addDate(myDB.db)
},2000);