Public record
Software health reportschema 0.34.0 · metrics 2.10.0 · 2026-09-12 07:11 UTC

microsoft / polyfills

A collection of polyfills for new web platform features.

JavaScriptMIT★ 8 stars⑂ 4 forkssince Mar 2026View on GitHub ↗

microsoft/polyfills holds a health index of 75 out of 100, placing it in the Good band. It scores highest on Sustainability & Governance (71/100) and lowest on Community & Adoption (57/100). It was last updated 10 days ago. A single contributor accounts for most of its recent work.

75
overall / 100
Good

Software health index

Metrics are grouped into weighted categories on one standardized 1–100 scale. Overall starts as their weighted mean, calibrated against the distribution of the public record so bands carry percentile meaning; when public evidence triggers the High-Risk Jurisdiction Policy, the rating is adjusted and receives an At Risk ceiling of 34.

75
Exceptional93-100The record's top tier (≈ top 5%); essentially all checked criteria met
Excellent80-92Strong across the board; minor gaps
Good65-79Healthy; gaps are limited and manageable
Moderate50-64Acceptable with notable gaps; review recommended
Weak35-49Material weaknesses across several areas
At Risk20-34Significant weaknesses; adoption warrants caution
Critical1-19Severe problems (abandoned, single-maintainer, no hygiene)
VitalityCommunity &AdoptionSustainability &GovernanceEngineeringQualitySecurityAI Readiness

Score profile

Each axis is a category. The shape matters more than the average — a healthy subject fills the whole shape, while a spike-and-crater profile means strength in one dimension is masking risk in another.

The weighted overall 65 is calibrated to 75 on the published index scale (record calibration 2026-08-02).

Ownership

MicrosoftOrganization · verified domain
129,555 followers8,301 public repossince Dec 2013

This repository is backed by an organization — shared, accountable stewardship that can outlive any single maintainer.

Package ecosystems

RegistryPackageVersionDownloads / moVersionsLast publishTags
npm@microsoft/focusgroup-polyfill1.6.061,0741043 days agofocusgrouppolyfilledgehtml

Metrics by category

Vitality

Is the project alive — is code being written and are releases shipping?

67Good · 21% of overall
How it's scored
28.8/36Push recency — last push 10 days ago
8.3/36Commit cadence — 12/52 weeks with commits
16.2/18Commit volume — 62 commits in the last year
8/10OpenSSF Scorecard: Maintained — 9 commit(s) and 1 issue activity found in the last 90 days -- score normalized to 8
Inputs used
commits_last_year62
human_commit_share0.968
days_since_last_push10
active_weeks_last_year12
How it's scored
27/27Ships releases — 1 releases published
36/36Release recency — latest release 43 days ago
12.6/27Release cadence — cadence unknown (single release)
0/10OpenSSF Scorecard: Signed-Releases — Project has not signed or included provenance with any releases.
Inputs used
releases_count1
latest_release_tag@microsoft/focusgroup-polyfill_v1.6.0
releases_from_tagsno
days_since_latest_release43
mean_days_between_releases—

Community & Adoption

Does the project have users, downloads, attention, and a welcoming setup for contributors?

57Moderate · 17% of overall
How it's scored
13.7/60Stars — 8 stars
4/25Forks — 4 forks
0/15Watchers — 1 watchers
Inputs used
forks4
stars8
watchers1
growth_stateunverified
growth_factor_pct100
growth_unverified_reasonno_history

Community health

85Excellent
How it's scored
22.5/22.5README
22.5/22.5License — recognized license (MIT)
18/18CONTRIBUTING guide
13.5/13.5Code of conduct
0/7.2Issue template
0/6.3PR template
Inputs used
has_readmeyes
has_licenseyes
readme_badges0
has_contributingyes
has_issue_templateno
has_code_of_conductyes
readme_badge_services—
has_pull_request_templateno
How it's scored
63.8/80Monthly downloads — 61,074 downloads/month across npm
0/20Registry dependents — not reported by this ecosystem
Inputs used
packages@microsoft/focusgroup-polyfill
dependents—
ecosystemsnpm
total_downloads—
monthly_downloads61,074
unverified_packages_excluded—
Excluded from scoring (no data or not applicable): Registry dependents. Remaining weights renormalized.

Sustainability & Governance

Will the project survive its people — bus factor, responsiveness, who backs it, and package upkeep?

71Good · 23% of overall
How it's scored
9/54Bus factor — 1 contributor(s) cover half of all commits
6.2/22.5Commit distribution — top contributor authored 72% of commits
8.1/13.5Contributor breadth — 6 contributors
3/10OpenSSF Scorecard: Contributors — project has 1 contributing companies or organizations -- score normalized to 3
Inputs used
bus_factor1
contributors_sampled6
top_contributor_share0.723
How it's scored
28/42Issue resolution — 67% of issues closed
23/30PR acceptance — 43/56 decided PRs merged
13/13Newcomer PR acceptance — 1/1 first-time contributors' PRs merged in 30d
9/15OpenSSF Scorecard: Code-Review — Found 18/29 approved changesets -- score normalized to 6
Inputs used
merged_prs43
open_issues2
closed_issues4
prs_merged_7d0
prs_decided_7d0
prs_merged_30d2
prs_decided_30d2
issue_closed_ratio0.667
closed_unmerged_prs13
first_time_authors_30d1
first_time_prs_merged_30d1
first_time_prs_decided_30d1
How it's scored
30/30Ownership backing — organization-owned
20/20Verified domain
25/25Owner reach — 129,555 followers of microsoft
25/25Track record — 8,301 public repos, account ~12 yr old
Inputs used
followers129,555
owner_typeOrganization
is_verifiedyes
owner_loginmicrosoft
public_repos8,301
account_age_days4,658

Package maintenance

100Exceptional
How it's scored
25/25Published & resolvable — 1 package(s) on npm
35/35Publish recency — latest publish 43 days ago
20/20Version history — 10 published versions
20/20Not deprecated — active, not deprecated or yanked
Inputs used
packages@microsoft/focusgroup-polyfill
ecosystemsnpm
any_deprecatedno
min_days_since_publish43

Engineering Quality

Are baseline engineering and documentation practices in place?

66Good · 19% of overall
How it's scored
24/24CI workflows — 2 workflow(s)
24/24Tests present
16/16Linter config — biome.json
0/9.6Pre-commit hooks
0/6.4.editorconfig
20/20OpenSSF Scorecard: CI-Tests — 19 out of 19 merged PRs checked by a CI test -- score normalized to 10
Inputs used
has_ciyes
has_testsyes
has_editorconfigno
has_linter_configyes
has_precommit_configno
How it's scored
30/30README
0/25Documentation directory
0/15Documentation / homepage site
10/10Repository description
0/10Topics
0/10Wiki
Inputs used
topics—
has_wikino
homepage—
docs_site—
has_readmeyes
has_docs_dirno
has_descriptionyes

Security

Are visible security and supply-chain practices strong, without unresolved high-risk jurisdiction exposure?

64Moderate · 16% of overall
How it's scored
7.5/7.5Binary-Artifacts — no binaries found in the repo
3.8/7.5Branch-Protection — branch protection is not maximal on development and all release branches
2.5/2.5CI-Tests — 19 out of 19 merged PRs checked by a CI test -- score normalized to 10
0/2.5CII-Best-Practices — no effort to earn an OpenSSF best practices badge detected
4.5/7.5Code-Review — Found 18/29 approved changesets -- score normalized to 6
0.8/2.5Contributors — project has 1 contributing companies or organizations -- score normalized to 3
10/10Dangerous-Workflow — no dangerous workflow patterns detected
7.5/7.5Dependency-Update-Tool — update tool detected
0/5Fuzzing — project is not fuzzed
2.5/2.5License — license file detected
6/7.5Maintained — 9 commit(s) and 1 issue activity found in the last 90 days -- score normalized to 8
0/5Packaging — no data
5/5Pinned-Dependencies — all dependencies are pinned
0/5SAST — SAST tool is not run on all commits -- score normalized to 0
5/5Security-Policy — security policy file detected
0/7.5Signed-Releases — Project has not signed or included provenance with any releases.
0/7.5Token-Permissions — detected GitHub workflow tokens with excessive permissions
0/7.5Vulnerabilities — 10 existing vulnerabilities detected
Inputs used
sourceopenssf_scorecard
checks_evaluated17
scorecard_versionv5.5.0
checks_inconclusive1
scorecard_aggregate5.5
Excluded from scoring (no data or not applicable): Packaging. Remaining weights renormalized.

Dependency advisories

100Exceptional
How it's scored
35/35Direct dependencies free of known advisories — no direct dependency carries a known advisory
0/25Indirect dependencies free of known advisories — transitive set not separable from development and test dependencies in this scope
0/40No advisories left outstanding — no advisory carries a publication date
Inputs used
sourceosv
advisories11
affected_packages5
assessed_packages201
unassessed_packages0
affected_by_severityhigh 5
direct_affected_packages0
Excluded from scoring (no data or not applicable): Indirect dependencies free of known advisories, No advisories left outstanding. Remaining weights renormalized. Matched 201 resolved dependencies against OSV. This repository publishes no package the index resolves, so the repository dependency graph was assessed instead. That graph mixes development and test pins with shipped dependencies, so only the declared runtime dependencies are scored; transitive findings are reported as context and excluded from the score. Reachability is not analyzed.

AI Readiness

How well is the repo equipped to be developed and maintained with AI coding agents? Carries a deliberately small weight (4%): agent tooling is a real maintenance signal, but a repository with none can still reach 100/100.

64Moderate · 4% of overall
How it's scored
0/45Agent instructions — no CLAUDE.md / AGENTS.md / editor rules
0/15Machine-readable docs (llms.txt)
36.4/40Legible commit history — 41 of 60 human commits state their intent (structured subject or explanatory body)
Inputs used
has_llms_txtno
llms_txt_url—
legible_history_share0.683
agent_instruction_files—
agent_instruction_max_bytes—
How it's scored
0/18One-command bootstrap
22/22Automated tests
11/11Lint / format config — biome.json
11/11Static type checking — packages/focusgroup/tsconfig.json
10/10Reproducible environment — lockfile
6.5/10Demonstrated agent practice — 2 of the last 62 commits agent-authored or agent-credited
8/8Automated maintenance — 1 of the last 62 commits are automated dependency updates
10/10OpenSSF Scorecard: Pinned-Dependencies — all dependencies are pinned
Inputs used
has_nixno
has_testsyes
lockfilespackage-lock.json
has_dockerfileno
typed_languageno
bootstrap_files—
has_devcontainerno
has_linter_configyes
typecheck_configspackages/focusgroup/tsconfig.json
agent_commit_share0.032
toolchain_manifests—
dependency_bot_commit_share0.016
How it's scored
27/45Type-checkable code — JavaScript with type-check config (packages/focusgroup/tsconfig.json)
55/55Manageable file sizes — 0/43 source files over 60KB
Inputs used
primary_languageJavaScript
largest_source_bytes40,032
source_files_sampled43
oversized_source_files0

Key facts

8GitHub stars
6contributors
62commits, last 12 months
10days since last push
1releases
1bus factor
2open issues
npmpackage ecosystems

Data collection warnings

  • Star history unavailable: GitHub GraphQL error: Resource not accessible by personal access token

More detail

Star and fork history 0 ★ / 4 ⇿
0Stars
4Forks
1Releases

When each star and fork was added, collected from GitHub and bucketed by day. Cumulative growth sits directly above the daily additions it is made of, so the two read against each other: steady organic accretion looks nothing like an abrupt, short-lived burst. Where that difference is measurable, it is reported as growth authenticity.

1223344412026-042026-062026-08
Major 0Minor 0Patch 0
OpenSSF Scorecard 5.5 / 10
5.5aggregate

Independent, tool-agnostic security assessment from the open-source OpenSSF Scorecard. Each check rewards a security practice, not a specific vendor's tool. Checks Scorecard could not determine are marked n/a and excluded from the security score (never counted as zero).Scorecard v5.5.0 · 2026-09-12 07:11 UTC

10Binary-Artifactsno binaries found in the repo
5Branch-Protectionbranch protection is not maximal on development and all release branches
10CI-Tests19 out of 19 merged PRs checked by a CI test -- score normalized to 10
0CII-Best-Practicesno effort to earn an OpenSSF best practices badge detected
6Code-ReviewFound 18/29 approved changesets -- score normalized to 6
3Contributorsproject has 1 contributing companies or organizations -- score normalized to 3
10Dangerous-Workflowno dangerous workflow patterns detected
10Dependency-Update-Toolupdate tool detected
0Fuzzingproject is not fuzzed
10Licenselicense file detected
8Maintained9 commit(s) and 1 issue activity found in the last 90 days -- score normalized to 8
n/aPackagingpackaging workflow not detected
10Pinned-Dependenciesall dependencies are pinned
0SASTSAST tool is not run on all commits -- score normalized to 0
10Security-Policysecurity policy file detected
0Signed-ReleasesProject has not signed or included provenance with any releases.
0Token-Permissionsdetected GitHub workflow tokens with excessive permissions
0Vulnerabilities10 existing vulnerabilities detected
All dependencies 201

Full resolved dependency set from the GitHub dependency graph: 0 direct and 201 indirect (transitive) packages. The transitive closure is complete when the repository commits a lockfile.

RegistryPackageVersionRelation
npm@babel/code-frame7.29.7indirect
npm@babel/helper-validator-identifier7.29.7indirect
npm@biomejs/biome2.4.13indirect
npm@biomejs/cli-darwin-arm642.4.13indirect
npm@biomejs/cli-darwin-x642.4.13indirect
npm@biomejs/cli-linux-arm642.4.13indirect
npm@biomejs/cli-linux-arm64-musl2.4.13indirect
npm@biomejs/cli-linux-x642.4.13indirect
npm@biomejs/cli-linux-x64-musl2.4.13indirect
npm@biomejs/cli-win32-arm642.4.13indirect
npm@biomejs/cli-win32-x642.4.13indirect
npm@emnapi/core1.10.0indirect
npm@emnapi/runtime1.10.0indirect
npm@emnapi/wasi-threads1.2.1indirect
npm@esbuild/aix-ppc640.28.1indirect
npm@esbuild/android-arm0.28.1indirect
npm@esbuild/android-arm640.28.1indirect
npm@esbuild/android-x640.28.1indirect
npm@esbuild/darwin-arm640.28.1indirect
npm@esbuild/darwin-x640.28.1indirect
npm@esbuild/freebsd-arm640.28.1indirect
npm@esbuild/freebsd-x640.28.1indirect
npm@esbuild/linux-arm0.28.1indirect
npm@esbuild/linux-arm640.28.1indirect
npm@esbuild/linux-ia320.28.1indirect
npm@esbuild/linux-loong640.28.1indirect
npm@esbuild/linux-mips64el0.28.1indirect
npm@esbuild/linux-ppc640.28.1indirect
npm@esbuild/linux-riscv640.28.1indirect
npm@esbuild/linux-s390x0.28.1indirect
npm@esbuild/linux-x640.28.1indirect
npm@esbuild/netbsd-arm640.28.1indirect
npm@esbuild/netbsd-x640.28.1indirect
npm@esbuild/openbsd-arm640.28.1indirect
npm@esbuild/openbsd-x640.28.1indirect
npm@esbuild/openharmony-arm640.28.1indirect
npm@esbuild/sunos-x640.28.1indirect
npm@esbuild/win32-arm640.28.1indirect
npm@esbuild/win32-ia320.28.1indirect
npm@esbuild/win32-x640.28.1indirect
npm@jridgewell/gen-mapping0.3.13indirect
npm@jridgewell/resolve-uri3.1.2indirect
npm@jridgewell/source-map0.3.11indirect
npm@jridgewell/sourcemap-codec1.5.5indirect
npm@jridgewell/trace-mapping0.3.31indirect
npm@microsoft/focusgroup-polyfill1.6.0indirect
npm@microsoft/shadowrootadoptedstylesheets-ponyfill0.0.1indirect
npm@napi-rs/wasm-runtime1.1.5indirect
npm@nodelib/fs.scandir2.1.5indirect
npm@nodelib/fs.stat2.0.5indirect
npm@nodelib/fs.walk1.2.8indirect
npm@oxc-project/types0.133.0indirect
npm@playwright/test1.61.0indirect
npm@rolldown/binding-android-arm641.0.3indirect
npm@rolldown/binding-darwin-arm641.0.3indirect
npm@rolldown/binding-darwin-x641.0.3indirect
npm@rolldown/binding-freebsd-x641.0.3indirect
npm@rolldown/binding-linux-arm-gnueabihf1.0.3indirect
npm@rolldown/binding-linux-arm64-gnu1.0.3indirect
npm@rolldown/binding-linux-arm64-musl1.0.3indirect
npm@rolldown/binding-linux-ppc64-gnu1.0.3indirect
npm@rolldown/binding-linux-s390x-gnu1.0.3indirect
npm@rolldown/binding-linux-x64-gnu1.0.3indirect
npm@rolldown/binding-linux-x64-musl1.0.3indirect
npm@rolldown/binding-openharmony-arm641.0.3indirect
npm@rolldown/binding-wasm32-wasi1.0.3indirect
npm@rolldown/binding-win32-arm64-msvc1.0.3indirect
npm@rolldown/binding-win32-x64-msvc1.0.3indirect
npm@rolldown/pluginutils1.0.1indirect
npm@size-limit/esbuild12.1.0indirect
npm@size-limit/file12.1.0indirect
npm@size-limit/preset-small-lib12.1.0indirect
npm@tybys/wasm-util0.10.2indirect
npm@types/node25.9.3indirect
npm@types/parse-path7.0.3indirect
npm@vercel/detect-agent1.2.3indirect
npm@yarnpkg/lockfile1.1.0indirect
npmacorn8.17.0indirect
npmargparse2.0.1indirect
npmbalanced-match1.0.2indirect
npmbeachball2.65.3indirect
npmbrace-expansion1.1.15indirect
npmbraces3.0.3indirect
npmbuffer-from1.1.2indirect
npmbytes-iec3.1.1indirect
npmcallsites3.1.0indirect
npmcommander2.20.3indirect
npmconcat-map0.0.1indirect
npmcosmiconfig9.0.2indirect
npmcross-spawn7.0.6indirect
npmdetect-libc2.1.2indirect
npmenv-paths2.2.1indirect
npmerror-ex1.3.4indirect
npmesbuild0.28.1indirect
npmexeca5.1.1indirect
npmfast-glob3.3.3indirect
npmfastq1.20.1indirect
npmfdir6.5.0indirect
npmfill-range7.1.1indirect
npmfsevents2.3.2indirect
npmfsevents2.3.3indirect
npmget-stream6.0.1indirect
npmgit-up8.1.1indirect
npmgit-url-parse16.1.0indirect
npmglob-hasher1.4.2indirect
npmglob-hasher-darwin-arm641.4.2indirect
npmglob-hasher-darwin-x641.4.2indirect
npmglob-hasher-linux-x64-gnu1.4.2indirect
npmglob-hasher-win32-arm64-msvc1.4.2indirect
npmglob-hasher-win32-x64-msvc1.4.2indirect
npmglob-parent5.1.2indirect
npmhuman-signals2.1.0indirect
npmimport-fresh3.3.1indirect
npmis-arrayish0.2.1indirect
npmis-extglob2.1.1indirect
npmis-glob4.0.3indirect
npmis-number7.0.0indirect
npmis-ssh1.4.1indirect
npmis-stream2.0.1indirect
npmisexe2.0.0indirect
npmjju1.4.0indirect
npmjs-tokens4.0.0indirect
npmjs-yaml4.2.0indirect
npmjson-parse-even-better-errors2.3.1indirect
npmkleur3.0.3indirect
npmlage2.15.11indirect
npmlefthook2.1.6indirect
npmlefthook-darwin-arm642.1.6indirect
npmlefthook-darwin-x642.1.6indirect
npmlefthook-freebsd-arm642.1.6indirect
npmlefthook-freebsd-x642.1.6indirect
npmlefthook-linux-arm642.1.6indirect
npmlefthook-linux-x642.1.6indirect
npmlefthook-openbsd-arm642.1.6indirect
npmlefthook-openbsd-x642.1.6indirect
npmlefthook-windows-arm642.1.6indirect
npmlefthook-windows-x642.1.6indirect
npmlightningcss1.32.0indirect
npmlightningcss-android-arm641.32.0indirect
npmlightningcss-darwin-arm641.32.0indirect
npmlightningcss-darwin-x641.32.0indirect
npmlightningcss-freebsd-x641.32.0indirect
npmlightningcss-linux-arm-gnueabihf1.32.0indirect
npmlightningcss-linux-arm64-gnu1.32.0indirect
npmlightningcss-linux-arm64-musl1.32.0indirect
npmlightningcss-linux-x64-gnu1.32.0indirect
npmlightningcss-linux-x64-musl1.32.0indirect
npmlightningcss-win32-arm64-msvc1.32.0indirect
npmlightningcss-win32-x64-msvc1.32.0indirect
npmlilconfig3.1.3indirect
npmlines-and-columns1.2.4indirect
npmmerge-stream2.0.0indirect
npmmerge21.4.1indirect
npmmicromatch4.0.8indirect
npmmimic-fn2.1.0indirect
npmminimatch3.1.5indirect
npmnanoid3.3.12indirect
npmnanoid5.1.11indirect
npmnanospinner1.2.2indirect
npmnpm-run-path4.0.1indirect
npmonetime5.1.2indirect
npmp-graph1.3.0indirect
npmp-limit3.1.0indirect
npmparent-module1.0.1indirect
npmparse-json5.2.0indirect
npmparse-path7.1.0indirect
npmparse-url9.2.0indirect
npmpath-key3.1.1indirect
npmpicocolors1.1.1indirect
npmpicomatch2.3.2indirect
npmpicomatch4.0.4indirect
npmplaywright1.61.0indirect
npmplaywright-core1.61.0indirect
npmpostcss8.5.15indirect
npmprompts2.4.2indirect
npmprotocols2.0.2indirect
npmqueue-microtask1.2.3indirect
npmresolve-from4.0.0indirect
npmreusify1.1.0indirect
npmrolldown1.0.3indirect
npmrun-parallel1.2.0indirect
npmsemver7.8.4indirect
npmshebang-command2.0.0indirect
npmshebang-regex3.0.0indirect
npmsignal-exit3.0.7indirect
npmsisteransi1.0.5indirect
npmsize-limit12.1.0indirect
npmsource-map0.6.1indirect
npmsource-map-js1.2.1indirect
npmsource-map-support0.5.21indirect
npmstrip-final-newline2.0.0indirect
npmterser5.46.2indirect
npmtinyglobby0.2.17indirect
npmto-regex-range5.0.1indirect
npmtslib2.8.1indirect
npmundici-types7.24.6indirect
npmvite8.0.16indirect
npmwhich2.0.2indirect
npmworkspace-tools0.41.8indirect
npmyargs-parser21.1.1indirect
npmyocto-queue0.1.0indirect
Dependency advisories 5

This repository publishes no package the index resolves, so its own dependency graph was assessed — 201 packages, which also include development and test pins that never ship: 5 carry known advisories, of which 0 are direct.

PackageVersionRelationSeverityAdvisoriesFixed in
brace-expansion1.1.15indirecthigh35.0.9
js-yaml4.2.0indirecthigh34.3.2
nanoid3.3.12indirecthigh25.1.16
nanoid5.1.11indirecthigh15.1.16
postcss8.5.15indirecthigh28.5.23

An advisory means the version recorded in the dependency graph falls inside an advisory’s affected range. Reachability is not analysed, and the graph includes development and test pins — a finding may concern tooling rather than shipped software.

Raw JSON report machine-readable

Feedback

Spotted something off in this report, or have thoughts to share? Wrong measurements, missed tooling, ideas, questions — anything is welcome. Every message is read and gets a response.

The message is kept through sign-in.

Scores are signals, not warranties. They reflect publicly visible practices on GitHub — not a code audit, and not a security guarantee.

Missing data is excluded and weights renormalized, never scored as zero. Methodology is versioned and open: metrics v2.10.0, schema v0.34.0 — full methodology · metrics wiki.

How one result sits in the wider record: aggregate statistics — npm.