rel="compression-dictionary"

This feature is not Baseline because it does not work in some of the most widely-used browsers.

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Experimental:This is anexperimental technology
Check theBrowser compatibility table carefully before using this in production.

Thecompression-dictionary keyword for therel attribute of the<link> element is a link that browsers can use to download acompression dictionary that can be used to compress future downloads for resources on this site so the download sizes of those resources are smaller than standard compression.

See theCompression Dictionary Transport guide for more information.