Baseline information is outdated for some CSS properties or unavailable for HTML attributes

[kcmr]

Type: Bug

Baseline information is outdated for some CSS properties. For instance, hovering over a "container" property indicates the property is "Newly available across major browsers (Baseline since 2023)". The linked page on MDN states it is Widely Available.
Additionally, the baseline information is not always available for HTML attributes in HTML files.

Screenshots:

VS Code version: Code 1.108.2 (Universal) (c9d77990917f3102ada88be140d28b038d1dd7c7, 2026-01-21T13:52:09.270Z)
OS version: Darwin arm64 25.2.0
Modes:

System Info

Item	Value
CPUs	Apple M4 Pro (12 x 2400)
GPU Status	2d_canvas: enabled direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_graphite: disabled_off trees_in_viz: disabled_off video_decode: enabled video_encode: enabled webgl: enabled webgl2: enabled webgpu: enabled webnn: disabled_off
Load (avg)	3, 3, 2
Memory (System)	24.00GB (0.26GB free)
Process Argv	--crash-reporter-id 71b1e0ca-4de5-43af-b5da-3f4ed6ab293d
Screen Reader	no
VM	0%

Extensions (119)

Extension	Author (truncated)	Version
vscode-unfancy-file-icons	ale	3.15.0
cucumberautocomplete	ale	3.0.5
tailwind-documentation	alf	0.1.16
vscode-css-modules	and	1.2.3
claude-code	Ant	2.1.23
css-sort	apr	1.0.1
astro-vscode	ast	2.16.8
es6-string-css	bas	0.1.0
toml	be5	0.6.0
beardedicons	Bea	1.22.0
github-markdown-preview	bie	0.3.0
lit-html	bie	1.11.1
markdown-checkbox	bie	0.4.0
markdown-emoji	bie	0.3.1
markdown-footnotes	bie	0.1.1
markdown-mermaid	bie	1.29.0
markdown-preview-github-styles	bie	2.2.0
markdown-yaml-preamble	bie	0.1.0
biome	bio	3.3.0
vscode-tailwindcss	bra	0.14.29
ruff	cha	2026.34.0
test-utils	chr	1.1.0
vscode-opennewinstance	chr	0.0.15
html-entities	chr	1.1.2
vscode-css-modules	cli	0.5.4
doxdocgen	csc	1.4.0
postcss	css	1.0.9
gitlab-ci-validator	cst	1.0.0
close-files	ctf	0.1.1
cucumber-official	Cuc	1.11.0
freemind	DaC	0.1.8
vscode-markdownlint	Dav	0.61.1
vscode-eslint	dba	3.0.20
vscode-axe-linter	deq	4.11.0
docker	doc	0.18.0
xml	Dot	2.5.1
gitlens	eam	17.9.0
json-tools	eri	1.0.2
prettier-vscode	esb	12.3.0
font-switcher	eva	4.1.0
code-runner	for	0.12.2
fontsize-shortcuts	fos	1.5.0
better-nunjucks	gin	0.4.0
codespaces	Git	1.18.5
copilot-chat	Git	0.36.0
vscode-github-actions	git	0.30.0
vscode-pull-request-github	Git	0.126.0
gitpod-desktop	git	0.0.184
vscode-graphql-syntax	Gra	1.3.8
import-lcov	gre	0.0.2
todo-tree	Gru	0.0.226
file-focus	her	1.6.0
rest-client	hum	0.25.1
vscode-spectral-quickfix	Ind	1.1.0-SNAPSHOT.1737024781
cassidy-dark	jac	1.1.2
css-nesting-syntax-highlighting	jac	0.4.0
jenkins-declarative-support	jmM	0.1.0
jq-syntax-highlighting	jq-	0.0.2
vscolors	kev	0.0.6
remove-unused-imports	kus	1.3.1
yamllint-fix	kus	1.1.0
vscode-makefile-term	lfm	0.1.1
i18n-ally	lok	2.13.1
gitless	maa	11.7.2
mypy	mat	0.4.2
template-string-converter	meg	0.6.1
git-graph	mhu	1.30.0
apply-tailwind	Min	0.0.1
vscode-azureresourcegroups	ms-	0.11.7
vscode-containers	ms-	2.4.0
vscode-docker	ms-	2.0.0
vscode-language-pack-es	MS-	1.108.2026012809
playwright	ms-	1.1.17
black-formatter	ms-	2025.2.0
debugpy	ms-	2025.18.0
isort	ms-	2025.0.0
python	ms-	2026.0.0
vscode-pylance	ms-	2025.10.4
vscode-python-envs	ms-	1.16.0
remote-containers	ms-	0.437.0
remote-ssh	ms-	0.122.0
remote-ssh-edit	ms-	0.87.0
remote-wsl	ms-	0.104.3
live-server	ms-	0.4.16
makefile-tools	ms-	0.12.17
remote-explorer	ms-	0.5.0
sublime-keybindings	ms-	4.1.10
vsliveshare	ms-	1.0.5959
snippetsNam	nam	1.0.6
color-highlight	nau	2.8.0
editorconfiggenerator	nep	0.2.1
env-cmd-file-syntax	Nix	0.3.0
chatgpt	ope	0.4.68
emoji	Per	1.0.1
cssvar	pho	2.6.5
vs-browser	Phu	2.3.1
material-icon-theme	PKi	5.31.0
quicktype	qui	23.0.170
make-runner	raj	1.0.3
vscode-yaml	red	1.20.2026012308
csv	Rep	1.2.2
vscode-coverage-gutters	rya	2.14.0
jinjahtml	sam	0.20.0
vscode-open	san	0.3.0
claude-dev	sao	3.47.0
vscode-fileutils	sle	3.10.3
stannum-makefile-syntax	sta	1.0.0
catppuccin-perfect-icons	tha	0.21.33
jest-snapshot-language-support	tle	1.1.1
vscode-mdx	uni	1.8.17
colonizer	uri	0.8.0
explorer	vit	1.38.1
gitblame	wad	11.2.0
vscode-js-console-utils	wht	0.7.0
change-case	wma	1.0.0
pretty-ts-errors	Yoa	0.7.0
type-challenges	YRM	1.16.0
markdown-pdf	yza	1.5.0
material-theme	zhu	3.19.0

(18 theme extensions excluded)

A/B Experiments

vsliv368cf:30146710
binariesv615:30325510
nativeloc1:31344060
dwcopilot:31170013
dwoutputs:31242946
copilot_t_ci:31333650
e5gg6876:31282496
pythonrdcb7:31342333
6518g693:31436602
aj953862:31281341
4f60g487:31327383
6abeh943:31336334
envsdeactivate2:31353495
cloudbuttont:31379625
3efgi100_wstrepl:31403338
use-responses-api:31390855
je187915:31401257
ec5jj548:31422691
cmp-ext-treat:31426748
cp_cls_t_966_ss:31446430
inlinechat_v2_hd992725:31445436
c0683394:31419495
ge8j1254_inline_auto_hint_haiku:31431912
nes-autoexp-off:31446584
a5gib710:31434435
5j92g670_sonnet:31451477
rename_enabled:31436409
7a04d226_do_not_restore_last_panel_session:31438103
anthropic_thinking_t:31432745
h0hdh950:31428394
preserve_tokens:31444547
cp_cls_c_1081:31443829
copilot-nes-oct-trt:31432596
ia-use-proxy-models-svc:31452481
nes-jump-on-with-edit:31450417
nes-slash-models-on:31441832
nes-set-to-on:31441941
a43f0575b:31442825
ts_provider_enabled:31446104
nes-conv-2-2:31447849