在onupgradeneeded事件中，将局部变量db设置为event.target.result，不设置为req.result，然后在onsuccess...
Closed opened this issueJun 29, 2020· 5 comments FuqiXcommentedJun 29, 2020 Steps to Reproduce Error Log (Desktop only) Console Output Stacktrace t.<anonymous> (file:///snap/superproductivity/673/resources/app.asar/dist/webpack:/src/app/core/persistence/database.service.ts:83:13) Ur (file...
Once the database is opened, operations need to be performed on object stores. An object store can be opened inside a [transaction that is in progress] (#transInProgress) or using a shorthand on the `$.indexedDB` object like. ``` javascript var objectStore = $.indexedDB("database_name"...
We have a multiple instance localForage setup in which we have two stores. There is a case where we encounter the following error: InvalidStateError: Failed to execute 'transaction' on 'IDBDatabase': The database connection is closing. O...
由于db是异步发现的，因此需要缓存Promise-wrapped（例如const dbPromise = ...），而不是原始的db。
Let’s start by reviewing what will/could occur when you will open the Indexed Database. The first mistake I did was to think that the onupgradeneeded event wasn’t followed by the onsuccess event. I was believing that onsuccess was only raised if the DB al...
You might've been thinking all along: "Yes! Why do I have to learn how toquerythe database, why can't I justgetAll(), then find what I want with JavaScript?" Indeed you can, but there's one problem: IndexedDB is designed to be a database, which means some people may store a...
Let’s start by reviewing what will/could occur when you will open the Indexed Database. The first mistake I did was to think that theonupgradeneededevent wasn’t followed by theonsuccessevent. I was believing thatonsuccesswas only raised if the DB already existed and opened successfully. ...
So, for example, in a MySQL database table called “person,” you could have two character columns for first and last name and a numeric column for age. In IndexedDB, what you can store can be more loose. I can store a person with a first and last name but an age value of ...
if (!window.indexedDB) { console.log("Your browser doesn't support a stable version of IndexedDB. Such and such feature will not be available."); } Opening a database We start the whole process like this: // Let us open our database var request = window.indexedDB.open("MyTestData...