HTML5/js sqlite数据库未进入事务功能
我有以下 javascript 函数：
function initDatabase() {
if (!window.openDatabase) {
alert('Databases not supported in this browser');
} else {
var shortName = 'TestDB';
var version = '1.0';
var displayName = 'HTML5 Test Database';
var maxSize = 1024 * 1024;
db = openDatabase(shortName, version, displayName, maxSize);
alert('opened db ' + db); //this says its a database
db.transaction(function (tx) {
alert('before create'); //never gets here
tx.executeSql('CREATE TABLE IF NOT EXISTS Person(FirstName TEXT, MiddleName TEXT, LastName TEXT);');
alert('after create');
});
alert('after transaction'); //does get here
}
}
在文档准备好时被调用：
$(document).ready(function () {
initDatabase();
});
正如您从注释中看到的，数据库似乎已创建/打开（但不确定如何验证这一点），但是当我尝试创建事务并执行一些 sql 时，该函数似乎从未被输入。
我做错了什么吗？我如何验证数据库是否存在？
我正在使用 Chrome 14 进行测试。
谢谢
I have the following javascript function:
function initDatabase() {
if (!window.openDatabase) {
alert('Databases not supported in this browser');
} else {
var shortName = 'TestDB';
var version = '1.0';
var displayName = 'HTML5 Test Database';
var maxSize = 1024 * 1024;
db = openDatabase(shortName, version, displayName, maxSize);
alert('opened db ' + db); //this says its a database
db.transaction(function (tx) {
alert('before create'); //never gets here
tx.executeSql('CREATE TABLE IF NOT EXISTS Person(FirstName TEXT, MiddleName TEXT, LastName TEXT);');
alert('after create');
});
alert('after transaction'); //does get here
}
}
being called on document ready:
$(document).ready(function () {
initDatabase();
});
As you can see from the comments, the database appears to be created/opened (not sure how I can verify this though) but when I attempt create a transaction and execute some sql, the function never seems to be entered.
Am I doing something wrong? How can I verify that the database even exists?
I am using Chrome 14 for testing.
Thanks
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警报似乎是警告。它可能会暂停某些事情，导致它无法工作。
无论如何，
alert被console.log“取代”（在调试方面），如果我用日志替换警报，一切似乎都正常（我得到了所有四个日志） ）。（要查看这些
console.log调用，您可以按 F12 并单击“控制台”。）The alert seems to be the caveat. It might be suspending things causing it not to work.
alertis "superseded" byconsole.loganyway (in terms of debugging), and if I replace the alerts with logs, everything seems to work (I get all four logs).(To view these
console.logcalls, you can press F12 and click on Console.)