Gets the amount of storage space, in bytes, used one or more items being stored in the storage area.
This function only exists in browser.storage.sync It does not exist in browser.storage.local 见 https://bugzilla.mozilla.org/show_bug.cgi?id=1385832
This is an asynchronous function that returns a
Promise
.
var gettingSpace = browser.storage.<storageType>.getBytesInUse(
keys
// null, string, or array of strings
)
<storageType>
can only be
storage.sync
, not
storage.local
because of
this bug
.
keys
A key (string) or keys (an array of strings) to identify the item(s) whose storage space you want to retrieve. If an array is passed in, 0 will be returned. If you pass
null
or
undefined
here, the function will return the space used by the entire storage area.
A
Promise
that will be fulfilled with an integer,
bytesUsed
, representing the storage space used by the objects that were specified in
keys
. If the operation failed, the promise will be rejected with an error message.
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