Could you please request the Privacy, Security, Enterprise, etc bits in
your chromestatus entry?
On 10/18/25 10:50 a.m., Chromestatus wrote:
*Contact emails*
[email protected], [email protected]
*Specification*
https://www.w3.org/TR/FileAPI
*Design docs*
/No information provided/
https://w3c.github.io/FileAPI/#dom-blob-bytes
*Summary*
The bytes() method of the Blob interface returns a Promise that
resolves with a Uint8Array containing the contents of the blob as an
array of bytes.
*Blink component*
Blink>Storage>FileAPI
<https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3EStorage%3EFileAPI%22>
*Web Feature ID*
file <https://webstatus.dev/features/file>
*Motivation*
Before this change developers could not access an ArrayBuffer directly
and had to create a Uint8Array view, and some APIs returned different
types which leading to inconsistency. To improve this, design
principles have changed[1] in w3c tag side, so the spec was updated[2]
accordingly. The new spec removes those hassles, and because WebKit,
Firefox and Node.js already support it, bringing it to Chromium will
improve interoperability as well. [1]
https://github.com/w3ctag/design-principles/issues/463 [2]
https://github.com/w3ctag/design-principles/pull/480 [3]
https://github.com/w3c/FileAPI/pull/198
*Initial public proposal*
/No information provided/
*TAG review*
/No information provided/
*TAG review status*
Not applicable
*Risks*
*Interoperability and Compatibility*
Safari 18 and Firefox 128 have already shipped the feature.
/Gecko/:
Shipped/Shipping (https://www.firefox.com/en-US/firefox/128.0/releasenotes)
/WebKit/:
Shipped/Shipping (https://webkit.org/blog/15865/webkit-features-in-safari-18-0)
/Web developers/: No signals
/Other signals/:
*WebView application risks*
Does this intent deprecate or change behavior of existing APIs, such
that it has potentially high risk for Android WebView-based applications?
/No information provided/
*Debuggability*
/No information provided/
*Will this feature be supported on all six Blink platforms (Windows,
Mac, Linux, ChromeOS, Android, and Android WebView)?*
Yes
All Blob APIs are exposed and platform-independent, and the bytes()
API is also supported on all platforms.
*Is this feature fully tested by web-platform-tests
<https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>?*
Yes
https://wpt.fyi/results/FileAPI/Blob-methods-from-detached-frame.html
https://wpt.fyi/results/FileAPI/blob/Blob-bytes.any.html
https://wpt.fyi/results/FileAPI/blob/Blob-bytes.any.worker.html
*Flag name on about://flags*
/No information provided/
*Finch feature name*
/No information provided/
*Non-finch justification*
/No information provided/
*Rollout plan*
Will ship enabled for all users
*Requires code in //chrome?*
False
*Estimated milestones*
No milestones specified
*Anticipated spec changes*
Open questions about a feature may be a source of future web compat or
interop issues. Please list open issues (e.g. links to known github
issues in the project for the feature specification) whose resolution
may introduce web compat/interop risk (e.g., changing to naming or
structure of the API in a non-backward-compatible way).
/No information provided/
*Link to entry on the Chrome Platform Status*
https://chromestatus.com/feature/4830298126417920?gate=5146453756084224
*Links to previous Intent discussions*
Intent to Prototype:
https://groups.google.com/a/chromium.org/d/msgid/blink-dev/688952f5.2b0a0220.35091d.0040.GAE%40google.com
This intent message was generated by Chrome Platform Status
<https://chromestatus.com>.
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