Skip to content

mention the payload limit of 64 KiB for sendBeacon() #42958

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
codersjj wants to merge 2 commits into
base: main
Choose a base branch
from
+2 −4
Open

mention the payload limit of 64 KiB for sendBeacon() #42958

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
083ed60
mention the payload limit of 64 KiB for `sendBeacon()`
codersjj Jan 29, 2026
2eaff04
Document 64 KiB payload limit for `sendBeacon()` `data` parameter
codersjj Jan 30, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
6 changes: 2 additions & 4 deletions files/en-us/web/api/navigator/sendbeacon/index.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -33,13 +33,11 @@ sendBeacon(url, data)
- `data` {{Optional_inline}}
- : An {{jsxref("ArrayBuffer")}}, a {{jsxref("TypedArray")}}, a {{jsxref("DataView")}}, a {{domxref("Blob")}},
a string literal or object, a {{domxref("FormData")}} or a {{domxref("URLSearchParams")}}
object containing the data to send.
object containing the data to send. The total size of queued data is limited to 64 KiB (65,536 bytes).

### Return value

Returns `true` if the
{{glossary("user agent")}} successfully queued the `data` for transfer.
Otherwise, it returns `false`.
Returns `true` if the {{glossary("user agent")}} successfully queued the `data` for transfer. Otherwise, it returns `false`.

## Description

Expand Down