[playground] improvements to output tab

[mellyeliu]

What changed / motivation ?

Small tweaks to output menu based on feedback from @ezzak

• Chevron direction more clear
• Output panel opens on JS/CSS output

Screen.Recording.2026-01-28.at.4.48.39.AM.mov

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Review	Updated (UTC)
stylex	Ready	Preview, Comment	Jan 28, 2026 9:51am

[github-actions]

workflow: benchmarks/perf

Comparison of performance test results, measured in operations per second. Larger is better.
yarn workspace v1.22.22
yarn run v1.22.22
$ node ./compare.js /tmp/tmp.dSX0jIt7D7 /tmp/tmp.ckoqkEcCF4

Results	Base	Patch	Ratio
babel-plugin: stylex.create
· basic create	559	542	0.97	-
· complex create	67	66	0.99	-
babel-plugin: stylex.createTheme
· basic themes	445	442	0.99	-
· complex themes	35	34	0.97	-
Done in 0.08s.
Done in 0.31s.

[github-actions]

workflow: benchmarks/size

Comparison of minified (terser) and compressed (brotli) size results, measured in bytes. Smaller is better.
yarn workspace v1.22.22
yarn run v1.22.22
$ node ./compare.js /tmp/tmp.zTGpQ4F7c7 /tmp/tmp.w0GlE06l4R

Results	Base	Patch	Ratio
@stylexjs/stylex/lib/cjs/stylex.js
· compressed	1,311	1,311	1.00
· minified	4,150	4,150	1.00
@stylexjs/stylex/lib/cjs/inject.js
· compressed	1,793	1,793	1.00
· minified	4,915	4,915	1.00
benchmarks/size/.build/bundle.js
· compressed	496,650	496,650	1.00
· minified	4,847,840	4,847,840	1.00
benchmarks/size/.build/stylex.css
· compressed	99,853	99,853	1.00
· minified	747,541	747,541	1.00
Done in 0.09s.
Done in 0.33s.