CacheStorage.delete() - Web APIs 编辑

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

You can access CacheStorage through the global caches property.

Syntax

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

Parameters

cacheName
The name of the cache you want to delete.

Return value

a Promise that resolves to true if the Cache object is found and deleted, and false otherwise.

Examples

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 object using 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);
        }
      }));
    })
  );
});

Specifications

SpecificationStatusComment
Service Workers
The definition of 'CacheStorage: delete' in that specification.
Working DraftInitial definition.

Browser compatibility

BCD tables only load in the browser

See also

如果你对这篇内容有疑问,欢迎到本站社区发帖提问 参与讨论,获取更多帮助,或者扫码二维码加入 Web 技术交流群。

扫码二维码加入Web技术交流群

发布评论

需要 登录 才能够评论, 你可以免费 注册 一个本站的账号。
列表为空,暂无数据

词条统计

浏览:114 次

字数:3924

最后编辑:7 年前

编辑次数:0 次

    我们使用 Cookies 和其他技术来定制您的体验包括您的登录状态等。通过阅读我们的 隐私政策 了解更多相关信息。 单击 接受 或继续使用网站,即表示您同意使用 Cookies 和您的相关数据。
    原文