f281310d39
From time to time, an angular.io page fails to load due to requesting a file that cannot be found neither on the server nor in the cache. We believe this is caused by the browser's partially clearing a cache. See #28114 for more details. Some time ago, we introduced [SwUpdate#unrecoverable][1] to help work around this issue by [reloading the page][2] when such an error is detected. However, this issue still pops up occasionally (for example, #41073). In an attempt to help diagnose the issue, this commit prints more info regarding the SW state and cache content when this error occurs. It will result in something like the following being printed to the console: ``` ServiceWorker: activated Cache: ngsw:/:db:control (2 entries) - https://angular.io/assignments: {"f5f02035-ee1f-463c-946c-e8b85badca25":"5c95f89a85255a6fefb4045a20f751ef32b2f3a4"} - https://angular.io/latest: {"latest":"5c95f89a85255a6fefb4045a20f751ef32b2f3a4"} Cache: ngsw:/:5c95f89a85255a6fefb4045a20f751ef32b2f3a4:assets:app-shell:cache (24 entries) - https://angular.io/0-es2015.867022f8bb092ae1efb1.worker.js - https://angular.io/announcement-bar-announcement-bar-module-es2015.1b5b762c9c8837c770f8.js - https://angular.io/api-api-list-module-es2015.40a43cd22f50f64d63bb.js ... Cache: ngsw:/:db:ngsw:/:5c95f89a85255a6fefb4045a20f751ef32b2f3a4:assets:app-shell:meta (1 entries) - https://angular.io/https://fonts.gstatic.com/s/robotomono/v13/L0x5DF4xlVMF-BfR8bXMIjhLq3-cXbKD.woff2: {"ts":1615031956601,"used":true} If you see this error, please report an issue at https://github.com/angular/angular/issues/new?template=3-docs-bug.md including the above logs. ``` NOTE: This change increases the main bundle by 1649B (0.37%), but it can be reverted as soon as we gather enough info to diagnose the issue. [1]: https://angular.io/api/service-worker/SwUpdate#unrecoverable [2]: https://github.com/angular/angular/blob/c676ec1ce5d586d4bc46/aio/src/app/sw-updates/sw-updates.service.ts#L55-L61 PR Close #41106
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