Add Core Web Vitals distribution histogram to tech report#1241
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alonkochba wants to merge 3 commits intoHTTPArchive:mainfrom
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Add Core Web Vitals distribution histogram to tech report#1241alonkochba wants to merge 3 commits intoHTTPArchive:mainfrom
alonkochba wants to merge 3 commits intoHTTPArchive:mainfrom
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Adds a collapsible histogram chart to the CWV section showing how origins are distributed across performance buckets for LCP, CLS, INP, FCP, and TTFB. Features: - Column chart with bars color-coded green/orange/red by CWV thresholds - Dashed plotlines marking good/needs-improvement boundaries - Tail buckets aggregated into an overflow "X+" bar so all origins are shown - Metric selector in the collapsed summary bar for quick switching - Loading spinner while the API call is in progress - Error message when data is unavailable - Light and dark mode support with theme-aware colors - Anchor link (#section-cwv_distribution) with auto-expand on direct navigation - URL hash updates when the section is expanded Fetches data from /v1/cwv-distribution (HTTPArchive/tech-report-apis#105) with technology, date, rank, and geo parameters. Also scopes the global .highcharts-point CSS rule to line/spline series only, so column chart bar colors are not overridden. Closes HTTPArchive#1147
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tunetheweb
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Apr 16, 2026
- Rename title/description per suggestion ("Core Web Vitals histograms")
- Restructure button bar so all 3 buttons appear first in DOM order,
followed by content wrappers (fixes tab order)
- Remove per-component metric selectors; the pass-rate timeseries
selector now drives the geo breakdown and histogram via a shared
cwv-metric-change event
- Deep-linking works via ?good-cwv-over-time=CLS
- Histogram resolves "overall" to LCP (has no combined view)
- Titles update dynamically ("LCP histogram", "INP geographic breakdown")
- Rename "Show distribution" button to "Show histogram"
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Summary
Adds two collapsible panels below the Core Web Vitals timeseries chart:
Both panels share a single button bar (alongside
Show table) with mutual exclusion — opening one closes the other. Content is lazy-loaded on first open.The metric selector from the pass-rate timeseries now drives all three components (timeseries, geo breakdown, histogram) via a shared
cwv-metric-changeevent and thegood-cwv-over-timeURL param. Deep-linking with?good-cwv-over-time=CLSapplies to all three. Titles update dynamically (LCP histogram,INP geographic breakdown, etc.). The histogram resolvesoveralltoLCPsince it shows one metric at a time.Also scopes the global
.highcharts-pointCSS rule to line/spline series only, so column chart bar colors render correctly.Depends on
/v1/cwv-distributionBigQuery endpointCloses #1147