Enables extensions to store and retrieve data, and listen for changes to stored items.
The storage system is based on the Web 存储 API , with a few differences. Among other differences, these include:
字符串
. Among other things, this includes:
数组
and
对象
, but only when their contents can be represented as JSON, which does not include DOM nodes. You don't need to convert your values to JSON
字符串
prior to storing them, but they are represented as JSON internally, thus the requirement that they be JSON-ifiable.
To use this API you need to include the
"storage"
permission
在您的
manifest.json
文件。
Each extension has its own storage area, which can be split into different types of storage.
Although this API is similar to
Window.localStorage
it is recommended that you don't use
Window.localStorage
in the extension code to store extension-related data. Firefox will clear data stored by extensions using the localStorage API in various scenarios where users clear their browsing history and data for privacy reasons, while data saved using the
storage.local
API will be correctly persisted in these scenarios.
You can examine the stored data under the Extension Storage item in the
Storage Inspector
tab of the
developer toolbox
, accessible from
about:debugging
.
注意： The storage area is not encrypted and shouldn't be used for storing confidential user information.
storage.StorageArea
An object representing a storage area.
storage.StorageChange
An object representing a change to a storage area.
storage
has three properties, which represent the different types of available storage area.
storage.sync
Represents the
sync
storage area. Items in
sync
storage are synced by the browser, and are available across all instances of that browser that the user is logged into, across different devices.
storage.local
Represents the
local
storage area. Items in
local
storage are local to the machine the extension was installed on.
storage.managed
Represents the
managed
storage area. Items in
managed
storage are set by the domain administrator and are read-only for the extension. Trying to modify this namespace results in an error.
storage.onChanged
Fired when one or more items change in a storage area.
BCD tables only load in the browser
注意：
This API is based on Chromium's
chrome.storage
API. This documentation is derived from
storage.json
in the Chromium code.
Microsoft Edge compatibility data is supplied by Microsoft Corporation and is included here under the Creative Commons Attribution 3.0 United States License.
最后修改： , 由 MDN 贡献者