我正在尝试使用IndexedDB,一切都运行良好,直到几个小时前我的.open()回调停止在Chrome上调用(在Safari上测试,它工作正常)。
RT.prototype.setupIndexedDB = function (callback) {
var dbName = "test";
var dbVersion = 1;
var indexedDB = window.indexedDB ||
window.webkitIndexedDB ||
window.mozIndexedDB;
console.log("setup indexed db");
var request = indexedDB.open(dbName, dbVersion);
request.onsuccess = function(e) {
console.log("db request success");
};
request.onblocked = function(e) {
console.log("DB open blocked", e);
};
request.onerror = function(err) {
console.log("error", err);
};
request.onversionchange = function(err) {
console.log("onversionchange", err);
};
request.onupgradeneeded = function(e) {
console.log("upgrade needed");
};
};
我查看了Chrome开发人员工具IndexedDB,没有任何内容......
任何人都知道发生了什么事?
谢谢
编辑:完全重新启动浏览器就可以了,但我仍然对了解发生的事情非常感兴趣。
答案 0 :(得分:5)
您是否在同一时间尝试删除数据库?如果存在阻塞的挂起deleteDatabase操作,则IndexedDB可能会陷入奇怪的(尽管根据规范是正确的)状态。例如。下面的代码。如果所有其他方法都失败了,您可以检查chrome:// indexeddb-internals,它会告诉您是否有任何待处理的打开或删除操作正在解决问题。
var request = indexedDB.open("test", 1);
request.onblocked = function(e) {
console.log("DB open blocked", e);
};
request.onerror = function(err) {
console.log("DB open error", err);
};
request.onupgradeneeded = function(e) {
console.log("DB open upgrade needed");
};
request.onsuccess = function(e) {
db = request.result;
console.log("DB open success");
db.onversionchange = function(e) {
console.log("DB got a versionchange event")
}
request = indexedDB.deleteDatabase("test");
request.onsuccess = function(e) {
console.log("delete success will not be called")
}
request.onblocked = function(e) {
console.log("delete was blocked");
request = indexedDB.open("test", 1);
request.onsuccess = function(e) {
console.log("success won't be called");
};
request.onblocked = function(e) {
console.log("blocked won't be called", e);
};
request.onerror = function(err) {
console.log("error won't be called", err);
};
request.onupgradeneeded = function(e) {
console.log("upgradeneeded won't be called");
};
};
};