www.cdc.gov: technology ↔ issues
Accessibility findings that appear disproportionately on pages running a given technology, across the 274 page(s) in 2026-W31 where both technology detection and an accessibility engine ran. Lift is how many times more likely a finding is on pages with the technology than on pages overall — a value of 2× means twice the baseline rate.
This is an association , not proof of cause. Technologies that are detected on the same set of pages (e.g. a CMS, its host, and its language) will share identical lift values; the listing groups by technology but cannot tell which one in a co-located stack is responsible. Treat high-lift pairs as leads for a human to confirm — a barrier that recurs with the same technology, especially across multiple sites, is likely a bug in that technology rather than in any one page's content.
YouTube 12 pages
Findings over-represented on pages running YouTube (lift ≥ 1, ≥5 pages support).
Finding
Lift
On tech pages
On all pages
Give every <iframe> a descriptive title attribute. (axe)
22.83×
8 / 12
8
When a landmark role/type repeats (e.g (axe)
3.26×
10 / 12
70
Moment.js 23 pages
Findings over-represented on pages running Moment.js (lift ≥ 1, ≥5 pages support).
Finding
Lift
On tech pages
On all pages
Associate every form control with a <label> (via for/id) or an aria-label/aria-labelledby. (axe)
11.91×
22 / 23
22
Form field has accessible name (alfa)
11.91×
7 / 23
7
Form field label is visible (alfa)
10.42×
7 / 23
8
No obsolete or deprecated elements are used (alfa)
3.31×
5 / 23
18
Text has minimum contrast ratio of 4.5:1 (alfa)
3.21×
7 / 23
26
Target size is at least 24×24 CSS pixels or has spacing (Minimum) (alfa)
3.21×
7 / 23
26
Each page should have exactly one <main> landmark. (axe)
2.91×
22 / 23
90
Increase the contrast between text and its background to at least 4.5:1 (3:1 for large text) (axe)
2.75×
15 / 23
65
Link is distinguishable without relying on color (alfa)
2.59×
5 / 23
23
Text has enhanced contrast (alfa)
1.46×
7 / 23
57
Target size is at least 44×44 CSS pixels (Enhanced) (alfa)
1.32×
7 / 23
63
DreamWeaver 24 pages
Findings over-represented on pages running DreamWeaver (lift ≥ 1, ≥5 pages support).
Finding
Lift
On tech pages
On all pages
Associate every form control with a <label> (via for/id) or an aria-label/aria-labelledby. (axe)
11.42×
22 / 24
22
Form field label is visible (alfa)
11.42×
8 / 24
8
Form field has accessible name (alfa)
11.42×
7 / 24
7
Text has minimum contrast ratio of 4.5:1 (alfa)
3.51×
8 / 24
26
Target size is at least 24×24 CSS pixels or has spacing (Minimum) (alfa)
3.51×
8 / 24
26
No obsolete or deprecated elements are used (alfa)
3.17×
5 / 24
18
Each page should have exactly one <main> landmark. (axe)
3.04×
24 / 24
90
Link is distinguishable without relying on color (alfa)
2.98×
6 / 24
23
Increase the contrast between text and its background to at least 4.5:1 (3:1 for large text) (axe)
2.81×
16 / 24
65
Text has enhanced contrast (alfa)
1.60×
8 / 24
57
Target size is at least 44×44 CSS pixels (Enhanced) (alfa)
1.45×
8 / 24
63
D3 24 pages
Findings over-represented on pages running D3 (lift ≥ 1, ≥5 pages support).
Finding
Lift
On tech pages
On all pages
Headings are structured hierarchically (alfa)
4.15×
8 / 24
22
Use heading levels in order (h1 → h2 → h3) without skipping; structure, not size. (axe)
2.72×
21 / 24
88
Scrolling content can be accessed by keyboard (alfa)
2.17×
8 / 24
42
Text has enhanced contrast (alfa)
1.60×
8 / 24
57
Target size is at least 44×44 CSS pixels (Enhanced) (alfa)
1.45×
8 / 24
63
Bootstrap 186 pages
Findings over-represented on pages running Bootstrap (lift ≥ 1, ≥5 pages support).
Finding
Lift
On tech pages
On all pages
When a landmark role/type repeats (e.g (axe)
1.47×
70 / 186
70
Scrolling content can be accessed by keyboard (alfa)
1.47×
42 / 186
42
aria attribute is permitted for element role (alfa)
1.47×
28 / 186
28
Remove or change the ARIA role — it isn't allowed on this element type. (axe)
1.47×
14 / 186
14
Give every <iframe> a descriptive title attribute. (axe)
1.47×
8 / 186
8
link-in-text-block (axe)
1.47×
7 / 186
7
Accessible name of link or button matches visible label (alfa)
1.47×
5 / 186
5
Text has sufficient color contrast (Enhanced) (alfa)
1.40×
18 / 186
19
page-has-heading-one (axe)
1.36×
12 / 186
13
Presentational children of an element are not focusable (alfa)
1.31×
8 / 186
9
jQuery 210 pages
Findings over-represented on pages running jQuery (lift ≥ 1, ≥5 pages support).
Finding
Lift
On tech pages
On all pages
When a landmark role/type repeats (e.g (axe)
1.30×
70 / 210
70
Scrolling content can be accessed by keyboard (alfa)
1.30×
42 / 210
42
aria attribute is permitted for element role (alfa)
1.30×
28 / 210
28
Associate every form control with a <label> (via for/id) or an aria-label/aria-labelledby. (axe)
1.30×
22 / 210
22
Remove or change the ARIA role — it isn't allowed on this element type. (axe)
1.30×
14 / 210
14
Presentational children of an element are not focusable (alfa)
1.30×
9 / 210
9
Give every <iframe> a descriptive title attribute. (axe)
1.30×
8 / 210
8
Form field label is visible (alfa)
1.30×
8 / 210
8
Form field has accessible name (alfa)
1.30×
7 / 210
7
link-in-text-block (axe)
1.30×
7 / 210
7
Table header has scope (alfa)
1.30×
7 / 210
7