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WordPress Filters and Caching Silently Deleted 49 Buttons From a Live Page

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A developer shipped a prompt-library page with 49 clipboard-copy buttons that worked flawlessly in preview but completely disappeared after going live. Investigating across three layers — database content, raw HTTP response, and browser DOM — revealed the buttons were never reaching the browser as valid HTML elements. The culprit was WordPress's built-in wptexturize() filter, which converts straight quotes to curly-quote HTML entities at render time, breaking inline onclick attribute syntax and causing the browser parser to silently swallow all 49 button tags. The fix involved removing inline event handlers from post content entirely and replacing them with a single delegated JavaScript listener attached to class-based markup. A separate caching layer then surfaced as a second bug, requiring additional investigation before the page fully functioned as intended.

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