diff options
author | MDN <actions@users.noreply.github.com> | 2022-02-17 00:50:41 +0000 |
---|---|---|
committer | MDN <actions@users.noreply.github.com> | 2022-02-17 00:50:41 +0000 |
commit | ca4e750a3400bfd4208831391f115d2f76da23ff (patch) | |
tree | d62c647c9a49175619cf7c619915e02360088c96 /files/zh-cn/web/api/idbdatabase/onversionchange/index.html | |
parent | c4f16c96e4b566dda3d48b91ebbb85de5c0a2ec3 (diff) | |
download | translated-content-ca4e750a3400bfd4208831391f115d2f76da23ff.tar.gz translated-content-ca4e750a3400bfd4208831391f115d2f76da23ff.tar.bz2 translated-content-ca4e750a3400bfd4208831391f115d2f76da23ff.zip |
[CRON] sync translated content
Diffstat (limited to 'files/zh-cn/web/api/idbdatabase/onversionchange/index.html')
-rw-r--r-- | files/zh-cn/web/api/idbdatabase/onversionchange/index.html | 97 |
1 files changed, 0 insertions, 97 deletions
diff --git a/files/zh-cn/web/api/idbdatabase/onversionchange/index.html b/files/zh-cn/web/api/idbdatabase/onversionchange/index.html deleted file mode 100644 index 3dc9534dea..0000000000 --- a/files/zh-cn/web/api/idbdatabase/onversionchange/index.html +++ /dev/null @@ -1,97 +0,0 @@ ---- -title: IDBDatabase.onversionchange -slug: Web/API/IDBDatabase/onversionchange -translation_of: Web/API/IDBDatabase/onversionchange ---- -<p>{{ APIRef("IndexedDB") }}</p> - -<p> {{domxref("IDBDatabase")}} 中的 <strong><code>onversionchange</code></strong> 事件处理器能处理版本更新事件,此事件能在任意地方 (很可能在同一台计算机上的另一个窗口/选项卡中)导致数据库结构更改({{ domxref("IDBOpenDBRequest.onupgradeneeded")}} 事件 或 {{ domxref("IDBFactory.deleteDatabase")}} 事件)的时候被触发 。</p> - -<div> -<p><strong><code>onversionchange</code></strong> 与 <code>versionchange</code> 是不相同的事件(但两者是有关联的)。</p> - -<p>{{AvailableInWorkers}}</p> -</div> - -<h2 id="语法">语法</h2> - -<pre class="syntaxbox" style="font-size: 14px;"><em>IDBDatabase</em>.onversionchange = <em>function</em>(event) { ... }</pre> - -<h2 id="举例">举例</h2> - -<p>本例展示了一个创建新对象仓库的 {{domxref("IDBOpenDBRequest.onupgradeneeded")}} 代码块;代码中包含用于处理失败操作的 <code style="font-style: normal;">onerror</code> 和 <code style="font-style: normal;">onabort</code> 函数,以及一个 onversionchange 函数用以在数据库结构被改变时通知用户。</p> - -<pre class="brush: js;highlight:[28,29,30,31,32]">request.onupgradeneeded = function(event) { - var db = event.target.result; - - db.onerror = function(event) { - note.innerHTML += '<li>Error opening database.</li>'; - }; - - db.onabort = function(event) { - note.innerHTML += '<li>Database opening aborted!</li>'; - }; - - // 给这个数据库创建对象仓库 - - var objectStore = db.createObjectStore("toDoList", { keyPath: "taskTitle" }); - - // 定义对象仓库中包含的数据项 - - objectStore.createIndex("hours", "hours", { unique: false }); - objectStore.createIndex("minutes", "minutes", { unique: false }); - objectStore.createIndex("day", "day", { unique: false }); - objectStore.createIndex("month", "month", { unique: false }); - objectStore.createIndex("year", "year", { unique: false }); - - objectStore.createIndex("notified", "notified", { unique: false }); - - note.innerHTML += '<li>Object store created.</li>'; - - db.onversionchange = function(event) { - note.innerHTML += '<li>a database change has occurred; you should refresh this - browser window, or close it down and use the other open version of - this application, wherever it exists.</li>'; - }; -};</pre> - -<h2 id="格式">格式</h2> - -<table class="standard-table"> - <tbody> - <tr> - <th scope="col">格式</th> - <th scope="col">状态</th> - <th scope="col">注释</th> - </tr> - <tr> - <td>{{SpecName('IndexedDB', '#widl-IDBDatabase-onversionchange', 'onversionchange')}}</td> - <td>{{Spec2('IndexedDB')}}</td> - <td> </td> - </tr> - <tr> - <td>{{SpecName("IndexedDB 2", "#dom-idbdatabase-onversionchange", "onversionchange")}}</td> - <td>{{Spec2("IndexedDB 2")}}</td> - <td> </td> - </tr> - </tbody> -</table> - -<h2 id="Browser_compatibility" name="Browser_compatibility">浏览器兼容性</h2> - -<div> -<p>{{Compat("api.IDBDatabase.onversionchange")}}</p> -</div> - -<h2 id="更多参考">更多参考</h2> - -<ul> - <li><a href="/en-US/docs/Web/API/IndexedDB_API/Using_IndexedDB">使用 IndexedDB</a></li> - <li>开始了解事务: {{domxref("IDBDatabase")}}</li> - <li>使用事务: {{domxref("IDBTransaction")}}</li> - <li>设置键值范围: {{domxref("IDBKeyRange")}}</li> - <li>检索与修改数据: {{domxref("IDBObjectStore")}}</li> - <li>使用游标: {{domxref("IDBCursor")}}</li> - <li>参考用例: <a class="external" href="https://github.com/mdn/to-do-notifications/tree/gh-pages">To-do Notifications</a> (<a class="external" href="http://mdn.github.io/to-do-notifications/">view example live</a>.)</li> - <li><code><a href="/en-US/docs/Web/API/IDBDatabase/versionchange_event">versionchange</a></code> 事件</li> -</ul> |