NEW 268370
<link rel=preload> doesn't work for fetch()'d resources 
https://bugs.webkit.org/show_bug.cgi?id=268370
Summary <link rel=preload> doesn't work for fetch()'d resources
Boris
Reported 2024-01-30 02:46:36 PST
Created attachment 469615 [details] a screenshot of the Network dev tools tab showing that other-file.txt is loaded twice I created these 3 files: index.html <!DOCTYPE html> <html lang="en"> <head> <link rel="preload" href="/other-file.txt" type="text/plain" as="fetch" crossorigin=""> <title>test fetch preload</title> </head> <body> <script src="/main.js"></script> </body> </html> main.js fetch('/other-file.txt') other-file.txt hello world Then I served them with `python -m http.server` and opened localhost:8000 in Safari 17. What I expected: main.js and other-file.txt would be loaded at the same time Actual: main.js and other-file.txt are indeed loaded at the exact same time, but then other-file.txt is loaded a second time after main.js and a few seconds later the console prints a warning that "The resource http://localhost:8000/other-file.txt was preloaded using link preload but not used within a few seconds from the window's load event. Please make sure it wasn't preloaded for nothing." This works correctly (as I expect) on both Chrome and Firefox.
Attachments
a screenshot of the Network dev tools tab showing that other-file.txt is loaded twice (84.18 KB, image/png)
2024-01-30 02:46 PST, Boris 		no flags
Details
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Radar WebKit Bug Importer
Comment 1 2024-02-06 02:47:14 PST
<rdar://problem/122376527>
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