Intent to Ship: Uint8Array to/from base64 and hex

[Rezvan Mahdavi Hezaveh]

Contact emails

rez...@chromium.org, s...@chromium.org

Explainer

None

Specification

https://tc39.es/proposal-arraybuffer-base64/spec

Summary

base64 is a common way to represent arbitrary binary data as ASCII. JavaScript has Uint8Arrays to work with binary data, but no built-in mechanism to encode that data as base64, nor to take base64'd data and produce a corresponding Uint8Arrays. This is a proposal to fix that. It also adds methods for converting between hex strings and Uint8Arrays.

Blink component

Blink>JavaScript>Language

TAG review

None

TAG review status

Not applicable

Risks

Interoperability and Compatibility

None

Gecko: Shipped/Shipping (https://bugzilla.mozilla.org/show_bug.cgi?id=1862220)

WebKit: Shipped/Shipping (https://webkit.org/blog/15798/release-notes-for-safari-technology-preview-202) https://bugs.webkit.org/show_bug.cgi?id=274635 https://bugs.webkit.org/show_bug.cgi?id=276215 https://bugs.webkit.org/show_bug.cgi?id=275593

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?

None

Debuggability

It is debugged as any other static method in JavaScript.

Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, ChromeOS, Android, and Android WebView)?

Yes

Is this feature fully tested by web-platform-tests?

Yes

https://github.com/tc39/test262/pull/3994

Flag name on about://flags

--js_base_64

Finch feature name

V8Flag_js_base_64

Rollout plan

Will ship enabled for all users

Requires code in //chrome?

False

Estimated milestones

Shipping on desktop	140
DevTrial on desktop	138
Shipping on Android	140
DevTrial on Android	138

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).

None

Link to entry on the Chrome Platform Status

https://chromestatus.com/feature/6281131254874112?gate=5080623806676992

This intent message was generated by Chrome Platform Status.

[Daniel Bratell]

LGTM1

/Daniel

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[Yoav Weiss (@Shopify)]

LGTM2

To view this discussion visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/9f72444c-bccb-43b8-838b-e7de3fd998da%40gmail.com.

[Philip Jägenstedt]

LGTM3

To view this discussion visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAOmohSLnV3Ofyui9hTZvwreE2wUfiu1KKPuqF8HcdSMX%2B8mCPQ%40mail.gmail.com.