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up.protocol X-Up-Title
HTTP header

The server may set this optional response header to change the document title after a fragment update.

Without this header Unpoly will extract the <title> from the server response.

This header is useful when you optimize your response to not render the application layout unless targeted. Since your optimized response no longer includes a <title>, you can instead use this HTTP header to pass the document title.

Example

X-Up-Title: Playlist browser
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