downloads API 的
- 一个代表了触发此下载的扩展的 ID 的
- 一个标识这个下载是否通过一个不安全的或已知的可疑的站点。可能被设置为 downloads.DangerType (en-US) 类型。
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.
- A string indicating why a download was interrupted. Possible values are defined in the downloads.InterruptReason (en-US) type. This is undefined if an error has not occurred.
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
DownloadItemthat's passed into downloads.onCreated (en-US)).
booleanindicating whether a downloaded file still exists (
true) or not (
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() (en-US) method, filtering for the file in question.
stringrepresenting the file's absolute local path.
numberindicating the total number of bytes in the whole file, after decompression. A value of -1 here means that the total file size is unknown.
integerrepresenting a unique identifier for the downloaded file that is persistent across browser sessions.
booleanthat indicates whether the download is recorded in the browser's history (
false), or not (
stringrepresenting the downloaded file's MIME type.
booleanindicating 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
stringrepresenting the downloaded file's referrer.
string(in ISO 8601 format) representing the number of milliseconds between the UNIX epoch and when this download began.
stringIndicating whether the download is progressing, interrupted, or complete. Possible values are defined in the downloads.State (en-US) type.
numberindicating 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.
stringrepresenting the absolute URL from which the file was downloaded.
BCD tables only load in the browser
The compatibility table in 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.
This API is based on Chromium's
Microsoft Edge compatibility data is supplied by Microsoft Corporation and is included here under the Creative Commons Attribution 3.0 United States License.