Feature: upgrade thumbnail quality #236
Draft
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
This PR adds an option to upgrade the quality of thumbnail images that is disabled by default. It doesn't upgrade thumbnails for shorts or if it's from an A/B test (I'm not sure A/B test thumbnails even have a higher quality than hqdefault).
It works by detecting thumbnail elements, parsing their URLs from their
background-image
inline style, rewriting the URL to use a higher quality version & with WebP if supported, loading the image in the background, and finally swapping the images out if it loads successfully.This PR is built on top of #235. That should be merged before this one.
Fixes #175, fixes #196, fixes #231