feat(html): add volume slider element

[mihar-22]

Refs #269

Stacked on #656

Summary

Volume slider element connecting to the player store for volume control.

API Surface

Element: <media-volume-slider> — extends slider with VolumeSliderCore, vertical orientation support, percentage formatting

Properties: label, disabled, thumbAlignment, orientation

Testing

pnpm -F @videojs/html test src/ui/volume-slider — 7 tests

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Project	Deployment	Actions	Updated (UTC)
vjs-10-demo-react	Ignored	Preview	Mar 1, 2026 5:08am

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[github-actions]

📦 Bundle Size Report

Package	Size	Diff		%
@videojs/core	10.28 kB	+14 B	██░░░░░░	+0.1%	🔺
@videojs/element	1.60 kB	0 B	░░░░░░░░	0%	✅
@videojs/html	18.36 kB	+106 B	████████	+0.6%	🔺
@videojs/icons	3.79 kB	0 B	░░░░░░░░	0%	✅
@videojs/react	14.90 kB	+24 B	██░░░░░░	+0.2%	🔺
@videojs/store	1.95 kB	0 B	░░░░░░░░	0%	✅
@videojs/utils	2.81 kB	0 B	░░░░░░░░	0%	✅

Total: 53.68 kB · +144 B · +0.3%

---

Entry Breakdown

Subpath sizes are the additional bytes on top of the root entry point, measured by bundling root + subpath together and subtracting the root-only size.

@videojs/core

Entry	Base	PR	Diff	%
.	4.25 kB	4.28 kB	+27 B	+0.6%	🔺
./dom	6.02 kB	6.01 kB	-13 B	-0.2%	🔽
total	10.27 kB	10.28 kB	+14 B	+0.1%

@videojs/element

Entry	Base	PR	Diff	%
.	817 B	817 B	0 B	0%	✅
./context	823 B	823 B	0 B	0%	✅
total	1.60 kB	1.60 kB	0 B	0%

@videojs/html

Entry	Base	PR	Diff	%
.	15.03 kB	15.20 kB	+173 B	+1.1%	🔺
./video	1.09 kB	1.06 kB	-35 B	-3.1%	🔽
./audio	1.07 kB	1.06 kB	-14 B	-1.3%	🔽
./background	1.07 kB	1.05 kB	-18 B	-1.6%	🔽
total	18.25 kB	18.36 kB	+106 B	+0.6%

@videojs/icons

Entry	Base	PR	Diff	%
./react	2.27 kB	2.27 kB	0 B	0%	✅
./html	1.52 kB	1.52 kB	0 B	0%	✅
total	3.79 kB	3.79 kB	0 B	0%

@videojs/store

Entry	Base	PR	Diff	%
.	1.29 kB	1.29 kB	0 B	0%	✅
./html	468 B	468 B	0 B	0%	✅
./react	204 B	204 B	0 B	0%	✅
total	1.95 kB	1.95 kB	0 B	0%

@videojs/utils

Entry	Base	PR	Diff	%
./array	104 B	104 B	0 B	0%	✅
./dom	928 B	928 B	0 B	0%	✅
./events	227 B	227 B	0 B	0%	✅
./function	261 B	261 B	0 B	0%	✅
./object	119 B	119 B	0 B	0%	✅
./predicate	265 B	265 B	0 B	0%	✅
./string	148 B	148 B	0 B	0%	✅
./style	185 B	185 B	0 B	0%	✅
./time	478 B	478 B	0 B	0%	✅
./number	158 B	158 B	0 B	0%	✅
total	2.81 kB	2.81 kB	0 B	0%

---

ℹ️ How to interpret

Sizes are minified + brotli, measured with esbuild.
Package totals are computed as root size + marginal subpath costs.
Subpath marginal cost = (root + subpath bundled together) − root alone.

Icon	Meaning
✅	No change
🔺	Increased ≤ 10%
🔴	Increased > 10%
🔽	Decreased
🆕	New (no baseline)

Run pnpm size locally to check current sizes.