fix: strip Sanity Stega zero-width characters from SEO meta tags - #44
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Sanity's Stega encoding injects invisible zero-width Unicode characters into text fields for visual editing overlays. These were leaking into og:title, og:description, twitter:title, twitter:description, and the standard meta description — causing garbled social sharing previews. Added stripStega() helper that removes characters in the Stega Unicode ranges (U+200B-U+200F, U+2028-U+202F, U+2060-U+2063, U+FEFF, U+FFF9-U+FFFB) before values are used in meta tags.
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Problem
Sanity's Stega encoding injects invisible zero-width Unicode characters into text fields for visual editing overlays. These were leaking into all SEO meta tags — , , , , and the standard \ — causing garbled or polluted social sharing previews.
Additionally, , , , and \ were resolving to \ URLs because \ was not set (fixed separately by setting the env var).
Fix
Added a \ helper in \ that removes characters in the Stega Unicode ranges before values are used in meta tags:
Applied to , , and \ before they're inserted into any meta tags.
Verified
Tested on \ — all meta tags now contain clean, human-readable text with no zero-width characters.