feat(gatsby-remark-images): Add flag to suppress css background-image to prevent FOUB #17154
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kimbaudi
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wardpeet
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Sep 9, 2019
Co-Authored-By: Ward Peeters <ward@coding-tech.com>
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Thanks for the code review. I've made the necessary changes. |
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ok sweet, thanks. Doing a quick test and I'll merge right after! Thank you for doing this and for your patience. |
wardpeet
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wardpeet
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@wardpeet - Although this PR got merged into master and gatsby-remark-images doc shows the new |
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I just confirmed that this PR got merged into master 😄 |
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Description
This PR makes changes to gatsby-plugin-sharp and gatsby-remark-images in order to address issue #16516.
I created a new option for
gatsby-remark-imagesplugin calleddisableBgImageOnAlphawhich is disabled by default. WhendisableBgImageOnAlphais enabled (i.e., set totrue), it will check the image file for opacity/transparency. If the image contains transparency, then thebackground-imagecss property is disabled on<span class="gatsby-resp-image-background-image"></span>, which will prevent the "flash of ugly blur-up" (FOUB).The reason why I made changes to
gatsby-plugin-sharpis to expose stats, which is how I determine whether the image contains transparency.Related Issues
Fixes #16516