[JS] Implement Float16Array

[dipikabh]

Acceptance criteria

• The listed features are documented sufficiently on MDN
• BCD is updated
• Interactive example and data repos are updated if appropriate
• The content has been reviewed as needed

For folks helping with Firefox related documentation

• Set bugs to dev-doc-complete
• Add entry to Firefox release notes for enabled/preview features
• Add/remove entry to Firefox experimental features page for preference/released features

Related Gecko bugs

Bug 1833647: Implement Float16Array

Features to document

From "Intent to prototype"

• Summary: Float16Array is a new typed array analogous to existing typed arrays like Float32Array. Float16 is widely used for GPU computation in applications where speed and memory use are more important than precision; having Float16Array in JavaScript will facilitate passing data to the GPU.
• Specification: https://github.com/tc39/proposal-float16array
• Preference: javascript.options.experimental.float16array

Other

• Check content open issues to see if any pertain to the subject matter. If there are any that can be closed because of the work, do so. If there are any that can be fixed relatively quickly because of the knowledge from completing this issue and you have time, feel free to go ahead and fix them.

[Josh-Cena]

I'll handle the docs part

[hamishwillee]

Thanks @Josh-Cena - when you're done cross link here please.

[hamishwillee]

Status:

• BCD JavaScript Float16array  browser-compat-data#23133
• Interactive examples Examples for float16 features interactive-examples#2781
• Docs Reference for stage-3 float16array #33652
• Experimental features FF127Expr feature - Float16Array #33673
• dev-docs-complete

Note, this is behind a pref that defaults to false. However some of the code in https://bugzilla.mozilla.org/show_bug.cgi?id=1833647 seems conditional on nightly, so I suspect at least the dataview stuff requires preview.

[hamishwillee]

@Josh-Cena Have you got a timeline/PR for the interactive examples part of this?

[Josh-Cena]

I'm sorry, traveling for the past weeks. I will send a PR for the interactive example soon (this week). We would at least need BCD to be merged too though.

[hamishwillee]

Thanks. BCD merged yesterday.