Indexeddb：onsuccess和oncomplete之间的差异？ [英] Indexeddb: Differences between onsuccess and oncomplete?

问题描述

我使用两个不同的事件回调，以便在IndexedDB事务完成或成功时进行响应：

I use two different events for the callback to respond when the IndexedDB transaction finishes or is successful:

让我们说... db：IDBDatabase对象，tr：IDBTransaction object，os：IDBObjectStore object

Let's say... db : IDBDatabase object, tr : IDBTransaction object, os : IDBObjectStore object

tr = db.transaction(os_name,'readwrite');
os = tr.objectStore();

case 1：

r = os.openCursor();
r.onsuccess = function(){
    if(r.result){
        callback_for_result_fetched();
        r.result.continue;
    }else callback_for_transaction_finish();
}

情况2：

tr.oncomplete = callback_for_transaction_finish();

如果两者的工作方式类似，这是一种浪费。所以你能告诉我，他们之间有什么区别吗？

It is a waste if both of them work similarly. So can you tell me, is there any difference between them?

推荐答案

虽然这些回调函数类似， ： onsuccess 和 oncomplete 之间的区别是事务完成但是对这些事务做出的请求是成功。

While it's true these callbacks function similarly they are not the same: the difference between onsuccess and oncomplete is that transactions complete but requests, which are made on those transactions, are successful.

oncomplete 仅在与交易相关的规范中定义。一个交易没有 onsuccess 回调。

oncomplete is only defined in the spec as related to a transaction. A transaction doesn't have an onsuccess callback.

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