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 | 394 | 149 KB | 1 | 3 ms | 100% |
| google-analytics.com JS | 394 | 0 KB | 1 | 19 ms | 100% |
| altmetric.com JS | 43 | 170 KB | 4 | 315 ms | 100% |
| cloudfront.net JS | 43 | 1 KB | 1 | 36 ms | 100% |
| dimensions.ai JS | 20 | 662 KB | 7 | 423 ms | 100% |
| google.com JS | 12 | 23 KB | 6 | 72 ms | 100% |
| facebook.net JS | 8 | 239 KB | 2 | 210 ms | 100% |
| gstatic.com JS | 8 | 52 KB | 2 | 0 ms | 100% |
| doubleclick.net JS | 8 | 1 KB | 5 | 472 ms | 100% |
| facebook.com | 8 | 0 KB | 1 | 129 ms | 100% |
| youtube-nocookie.com JS | 7 | 1.1 MB | 8 | 740 ms | 100% |
| ytimg.com | 7 | 40 KB | 1 | 0 ms | 100% |
| googleadservices.com | 7 | 1 KB | 1 | 31 ms | 100% |
| googleapis.com | 7 | 0 KB | 1 | 0 ms | 100% |
| powerbigov.us JS | 4 | 7.7 MB | 42 | 2740 ms | 100% |
| usgovcloudapi.net | 4 | 104 KB | 8 | 0 ms | 100% |
| powerbi.com | 4 | 15 KB | 1 | 0 ms | 100% |
| youtube.com JS | 4 | 10 KB | 2 | 83 ms | 100% |
| azure.com | 4 | 2 KB | 1 | 0 ms | 100% |
| noembed.com | 3 | 1 KB | 1 | 39 ms | 100% |
| microsoft.com | 1 | 758 KB | 1 | 344 ms | 100% |
| cloudflare.com | 1 | 1 KB | 1 | 189 ms | 100% |