DownloadItem
type of the
downloads
API represents a downloaded file.
Values of this type are objects. They contain the following properties:
byExtensionId
可选
A
string
representing the ID of the extension that triggered the download (if it was triggered by an extension). This does not change once set. If the download was not triggered by an extension this is undefined.
byExtensionName
可选
A
string
representing the name of the extension that triggered the download (if it was triggered by an extension). This may change if the extension changes its name or the user changes their locale. If the download was not triggered by an extension this is undefined.
bytesReceived
A
编号
representing the number of bytes received so far from the host during the download; this does not take file compression into consideration.
canResume
A
boolean
indicating whether a currently-interrupted (e.g. paused) download can be resumed from the point where it was interrupted (
true
), or not (
false
).
cookieStoreId
可选
The cookie store ID of the contextual identity in which the download took place.
danger
A string indicating whether this download is thought to be safe or known to be suspicious. Its possible values are defined in the
downloads.DangerType
类型。
endTime
可选
A
string
(in
ISO 8601
format) representing the number of milliseconds between the UNIX epoch and when this download ended. This is undefined if the download has not yet finished.
error
可选
A string indicating why a download was interrupted. Possible values are defined in the
downloads.InterruptReason
type. This is undefined if an error has not occurred.
estimatedEndTime
可选
A
string
(in
ISO 8601
format) representing the estimated number of milliseconds between the UNIX epoch and when this download is estimated to be completed. This is undefined if it is not known (in particular, it is undefined in the
DownloadItem
that's passed into
downloads.onCreated
).
exists
A
boolean
indicating whether a downloaded file still exists (
true
) 或不 (
false
). This information might be out-of-date, as browsers do not automatically watch for file removal — to check whether a file exists, call the
downloads.search()
method, filtering for the file in question.
filename
A
string
representing the file's absolute local path.
fileSize
A
编号
indicating the total number of bytes in the whole file, after decompression. A value of -1 here means that the total file size is unknown.
id
An
integer
representing a unique identifier for the downloaded file that is persistent across browser sessions.
incognito
A
boolean
that indicates whether the download is recorded in the browser's history (
false
), or not (
true
).
mime
A
string
representing the downloaded file's MIME type.
paused
A
boolean
indicating whether the download is paused, i.e. if the download has stopped reading data from the host but has kept the connection open. If so, the value is
true
,
false
若不。
referrer
A
string
representing the downloaded file's referrer.
startTime
A
string
(in
ISO 8601
format) representing the number of milliseconds between the UNIX epoch and when this download began.
state
A
string
Indicating whether the download is progressing, interrupted, or complete. Possible values are defined in the
downloads.State
类型。
totalBytes
A
编号
indicating the total number of bytes in the file being downloaded. This does not take file compression into consideration. A value of -1 here means that the total number of bytes is unknown.
url
A
string
representing the absolute URL from which the file was downloaded.
BCD tables only load in the browser
注意：
This API is based on Chromium's
chrome.downloads
API。
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