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Anthony Lio 6d08a747f1 fix(docs): guide reference perf enhancements (#50239)
## What kind of change does this PR introduce?

follow-up to #50235 to reduce reference page payloads and cold rendering
overhead

## What is the current behavior?

reference pages ship a large rsc payload inside the html _ most of it is
duplication rather than content along with shiki that writes ~30
character css variable name for every syntax token making the page heavy
in some cases

## What is the new behavior?

- moves repeated styles into shared css and uses compact, namespaced
token classes
- renders details icons inside the client trigger
- follows shiki’s guidance to [reuse one
highlighter](https://shiki.style/guide/best-performance#cache-the-highlighter-instance)
and [load languages on
demand](https://shiki.style/guide/best-performance#use-shorthands)

`page size`
page | before | after | change
-- | -- | -- | --
javascript | 10.61 mb | 8.28 mb | -21.9%
dart | 4.59 mb | 4.13 mb | -10.1%
python | 4.38 mb | 3.73 mb | -14.9%
swift | 2.87 mb | 2.56 mb | -10.9%
server | 1.59 mb | 1.35 mb | -15.2%
kotlin | 3.42 mb | 3.17 mb | -7.2%

`cold initialization`
language | before | after | reduction
-- | -- | -- | --
bash | 2,180 ms | 23 ms | 98.95%
javascript | 2,245 ms | 38 ms | 98.29%

## Additional context

measured on a local production build which uses the checked in generated
content _ production has larger sdk data, so absolute sizes there will
be higher

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **New Features**
* Added reusable expand/collapse controls for API reference details,
with updated icons, labels, and styling.
* Improved code block rendering with class-based syntax highlighting,
wrapped-code support, responsive layouts, and lazy language loading.

* **Style**
* Added theme-aware syntax-token colors, line-number styling, and
configurable code-block shadows.
  * Consolidated expandable reference panel and item styling.

* **Tests**
* Added coverage for syntax highlighting, code block rendering, language
support, token stability, and reference details.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
2026-09-15 23:55:49 +03:00

59 lines
1.9 KiB
TypeScript

import { readFileSync } from 'node:fs'
import { describe, expect, it } from 'vitest'
import { getCodeBlockLabel, getTokenClassName } from './CodeBlock.utils'
import theme from './supabase-2.json' with { type: 'json' }
const themeColors = (): Array<string> => {
const colors = new Set<string>()
const walk = (node: unknown) => {
if (Array.isArray(node)) {
node.forEach(walk)
return
}
if (node === null || typeof node !== 'object') return
for (const [key, value] of Object.entries(node)) {
if ((key === 'foreground' || key === 'background') && typeof value === 'string') {
colors.add(value)
}
walk(value)
}
}
walk(theme)
return [...colors]
}
describe('token class names', () => {
it('maps every theme color to a class', () => {
const colors = themeColors()
expect(colors.length).toBeGreaterThan(0)
const css = readFileSync(new URL('../../../styles/code-block.css', import.meta.url), 'utf8')
for (const color of colors) {
expect(getTokenClassName(color, 0), `${color} is missing from the class table`).toMatch(
/^s-[a-z]$/
)
expect(css).toContain(`.shiki .${getTokenClassName(color, 0)} {\n color: ${color};`)
}
})
it('appends font style classes', () => {
expect(getTokenClassName('var(--code-token-comment)', 1)).toBe('s-c s-i')
expect(getTokenClassName(undefined, 2 | 4)).toBe('s-b s-l')
expect(getTokenClassName(undefined, 0)).toBeUndefined()
expect(getTokenClassName(undefined, -1)).toBeUndefined()
})
})
describe('code block labels', () => {
it('names language aliases and singular or plural line counts', () => {
expect(getCodeBlockLabel('ts', 1)).toBe('TypeScript, 1 line')
expect(getCodeBlockLabel('sh', 2)).toBe('Shell, 2 lines')
expect(getCodeBlockLabel('rust', 3)).toBe('rust, 3 lines')
expect(getCodeBlockLabel(null, 1)).toBe('1 line')
})
})