www.cdc.gov: third parties
Third-party JavaScript is easy to add and often reduces accessibility and performance — it injects DOM the site owner never reviewed and adds load time. "Pages w/ finding" is the share of pages carrying this vendor that also had an accessibility finding: an association to investigate, not proof the vendor caused it. Third parties vary per page, so a vendor on few pages may simply not have been sampled elsewhere.
| Vendor (registrable domain) | Pages | Median bytes | Median requests | Median load | Pages w/ finding |
|---|---|---|---|---|---|
| googletagmanager.com JS | 744 | 154 KB | 1 | 2 ms | 100% |
| google-analytics.com JS | 742 | 0 KB | 1 | 19 ms | 100% |
| altmetric.com JS | 52 | 178 KB | 4 | 371 ms | 100% |
| cloudfront.net JS | 52 | 1 KB | 1 | 18 ms | 100% |
| google.com JS | 30 | 24 KB | 1 | 0 ms | 100% |
| gstatic.com JS | 27 | 52 KB | 2 | 0 ms | 100% |
| dimensions.ai JS | 26 | 661 KB | 6 | 383 ms | 100% |
| ytimg.com | 24 | 45 KB | 1 | 0 ms | 100% |
| googleapis.com JS | 24 | 0 KB | 1 | 0 ms | 100% |
| youtube-nocookie.com JS | 20 | 1.1 MB | 9 | 592 ms | 100% |
| noembed.com | 19 | 1 KB | 1 | 13 ms | 100% |
| doubleclick.net JS | 7 | 0 KB | 4 | 0 ms | 100% |
| youtube.com JS | 4 | 1.7 MB | 14 | 897 ms | 100% |
| ggpht.com | 4 | 4 KB | 1 | 0 ms | 100% |
| facebook.net JS | 3 | 250 KB | 2 | 228 ms | 100% |
| facebook.com | 3 | 0 KB | 1 | 57 ms | 100% |
| googleadservices.com | 2 | 1 KB | 1 | 77 ms | 100% |
| powerbigov.us JS | 1 | 7.8 MB | 41 | 3095 ms | 100% |
| typekit.net | 1 | 231 KB | 9 | 235 ms | 100% |
| hotjar.com JS | 1 | 72 KB | 2 | 290 ms | 100% |
| usgovcloudapi.net | 1 | 60 KB | 5 | 0 ms | 100% |
| powerbi.com | 1 | 15 KB | 1 | 0 ms | 100% |
| azure.com | 1 | 2 KB | 1 | 0 ms | 100% |
| usajobs.gov | 1 | 1 KB | 2 | 317 ms | 100% |
| office.net | 1 | 1 KB | 1 | 0 ms | 100% |