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• 句法
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

delete () 方法在 CacheStorage interface finds the 缓存 object matching the cacheName , and if found, deletes the 缓存 object and returns a Promise that resolves to true . If no 缓存 object is found, it resolves to false .

You can access CacheStorage through the global caches 特性。

句法

caches.delete(cacheName).then(function(boolean) {
  // your cache is now deleted
});
					

参数

cacheName

The name of the cache you want to delete.

返回值

a Promise that resolves to true 若 缓存 object is found and deleted, and false 否则。

范例

In this code snippet we wait for an activate event, and then run a waitUntil() block that clears up any old, unused caches before a new service worker is activated. Here we have an array of cache names we want to keep ( cachesToKeep ). We return the keys of the caches in the CacheStorage 对象使用 CacheStorage.keys , then check each key to see if it is in the array. If not, we delete it using delete() .

this.addEventListener('activate', function(event) {
  var cachesToKeep = ['v2'];
  event.waitUntil(
    caches.keys().then(function(keyList) {
      return Promise.all(keyList.map(function(key) {
        if (cachesToKeep.indexOf(key) === -1) {
          return caches.delete(key);
        }
      }));
    })
  );
});
					

规范

规范	状态	注释
服务工作者 The definition of 'CacheStorage: delete' in that specification.	工作草案	初始定义。

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
delete	Chrome 40	Edge 16	Firefox 44 44 Extended Support Releases (ESR) before Firefox 78 ESR do not support service workers and the Push API.	IE No	Opera 27	Safari 11.1	WebView Android 40	Chrome Android 40	Firefox Android 44	Opera Android 27	Safari iOS Yes	Samsung Internet Android 4.0

图例

完整支持

完整支持

不支持

不支持

实验。期望将来行为有所改变。

实验。期望将来行为有所改变。

见实现注意事项。

另请参阅

• 使用服务工作者
• 缓存
• WindowOrWorkerGlobalScope.caches

元数据

• 最后修改： Mar 24, 2020

相关话题

1. 服务工作者 API
2. CacheStorage
3. 方法

   1. delete()
   2. has()
   3. keys()
   4. match()
   5. open()
4. Related pages for Service Workers API

   1. 缓存
   2. Client
   3. Clients
   4. ExtendableEvent
   5. FetchEvent
   6. InstallEvent
   7. Navigator.serviceWorker
   8. NotificationEvent
   9. PeriodicSyncEvent
   10. PeriodicSyncManager
   11. PeriodicSyncRegistration
   12. ServiceWorker
   13. ServiceWorkerContainer
   14. ServiceWorkerGlobalScope
   15. ServiceWorkerRegistration
   16. SyncEvent
   17. SyncManager
   18. SyncRegistration
   19. WindowClient