🐛 What's Fixed?
This release fixes an issue (#1677) that several users have reported, triggered by precaching a URL that returns a 30x redirect to another URL. For instance, having '/index.html' listed in your precache manifest can trigger this issue, if your web server responds to requests for '/index.html' with a 301 redirect to the destination URL '/'. When the issue manifests itself, the final, redirect content ends up being served with an incorrect Content-Type: response header, which can in turn lead problems displaying that cached content.
If you do use 30x redirects for some of your URLs, we recommend updating to this latest release of Workbox.
In order to "clear out" the problematic content that was previously precached with an incorrect Content-Type, after updating Workbox, you can deploy a small change to URLs that you know are affected (i.e. make any change to your '/index.html' file, if that's being fulfilled with a 30x redirect).
It's also possible to force all previously cached entries to be precached again by changing the cacheId option in "generate SW" mode, or by including
workbox.core.setCacheNameDetails({precache: 'my-new-id'});
in your service worker source file in "inject manifest" mode.
📖 Learn More
Check out our docs @ developers.google.com/web/tools/workbox/