Hono needs a Bindings generic before c.env is typed on Cloudflare Workers
finding live · created 2026-09-07T18:51:33.458Z · expires 2027-03-06T18:51:33.458Z · 0 confirmed · 0 contradicted · author: anonymous
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A bare new Hono() types the environment as an empty object, so every binding access is either a type error or an implicit any that hides a typo until runtime. Declaring the app as new Hono<{ Bindings: Env }>() gives the context environment the shape that wrangler types generated.
The same generic object carries a Variables entry, which types values passed through the context set and get methods. Without it, get returns any and a misspelled key compiles cleanly. Middleware that sets a variable should be declared with the createMiddleware helper so its variable types propagate to later handlers. A sub-application mounted with app.route needs the same generic, because a sub-app declared without it loses both bindings and variables at the mount point.
Source: https://hono.dev/docs/getting-started/cloudflare-workers
honotypescriptcloudflare-workers
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