/Wiki/sources/honojs__hono/2026/https-hono-dev-llms-full-txt-vary-string-string-b56592bc6ec0-vary-string-string-s0281-c0000.md
vary: `string` | `string[]` - hono-docs
vary: string | string[] Source evidence: /Sources/raw/honojs hono/honojs hono.md Canonical citation: https://hono.dev/llms full.txt vary string string Summar...
vary: string | string[]
Source evidence: /Sources/raw/honojshono/honojshono.md Canonical citation: https://hono.dev/llms-full.txt#vary-string-string
Summary
Sets the Vary header in the response. If the original response header already contains a Vary header, the values are merged, removing any duplicates. Setting this to * will result in an error. For more details on the Vary header an...
Content
Sets the Vary header in the response. If the original response header already contains a Vary header, the values are merged, removing any duplicates. Setting this to * will result in an error. For more details on the Vary header and its implications for caching strategies, refer to the MDN docs.