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 | 720 | 156 KB | 1 | 3 ms | 100% |
| google-analytics.com JS | 665 | 0 KB | 1 | 18 ms | 100% |
| altmetric.com JS | 67 | 180 KB | 4 | 354 ms | 100% |
| cloudfront.net JS | 67 | 1 KB | 1 | 16 ms | 100% |
| dimensions.ai JS | 34 | 662 KB | 6 | 341 ms | 100% |
| digitalgov.gov JS | 33 | 12 KB | 1 | 1 ms | 100% |
| google.com JS | 23 | 24 KB | 1 | 0 ms | 100% |
| gstatic.com JS | 20 | 52 KB | 2 | 0 ms | 100% |
| googleapis.com JS | 20 | 0 KB | 1 | 0 ms | 100% |
| ytimg.com | 19 | 30 KB | 1 | 0 ms | 100% |
| youtube-nocookie.com JS | 17 | 1.1 MB | 9 | 576 ms | 100% |
| noembed.com | 15 | 1 KB | 1 | 24 ms | 100% |
| doubleclick.net JS | 6 | 1 KB | 5 | 167 ms | 100% |
| powerbigov.us JS | 5 | 7.8 MB | 38 | 3354 ms | 100% |
| ggpht.com | 5 | 4 KB | 1 | 0 ms | 100% |
| azure.com | 5 | 2 KB | 1 | 0 ms | 100% |
| usgovcloudapi.net | 5 | 1 KB | 3 | 0 ms | 100% |
| office.net | 5 | 1 KB | 1 | 0 ms | 100% |
| facebook.net JS | 4 | 245 KB | 2 | 242 ms | 100% |
| jsdelivr.net JS | 4 | 57 KB | 3 | 169 ms | 100% |
| jquery.com JS | 4 | 30 KB | 1 | 84 ms | 100% |
| facebook.com | 4 | 0 KB | 1 | 60 ms | 100% |
| googleadservices.com | 3 | 1 KB | 1 | 45 ms | 100% |
| youtube.com JS | 2 | 5.6 MB | 48 | 11915 ms | 100% |
| powerbi.com | 2 | 15 KB | 1 | 0 ms | 100% |
| govdelivery.com JS | 1 | 233 KB | 9 | 649 ms | 100% |
| typekit.net | 1 | 231 KB | 9 | 100 ms | 100% |
| hotjar.com JS | 1 | 72 KB | 2 | 139 ms | 100% |