Request body methods (json/text/arrayBuffer) not callable as a value / via computed key (typeof is 'object'/'undefined') #1698

Scope

Request's body methods work when called directly (req.json() — #1688), but fail when accessed as a value or via a computed key:

const req = new Request('http://localhost/x', {
  method: 'POST', headers: { 'content-type': 'application/json' }, body: '{"x":1}',
})
console.log(typeof req.json)            // perry: 'object'    | node: 'function'
const key = 'json'
console.log(typeof (req as any)[key])   // perry: 'undefined' | node: 'function'
console.log(await (req as any)[key]())  // perry: null/throws | node: {"x":1}

This blocks Hono's c.req.json() end-to-end (#1655): Hono's HonoRequest.#cachedBody does raw[key]() (computed-key call), which yields undefined → throws value is not a function. The POST /api/echo route reaches the handler (status 200) but await c.req.json() throws.

Likely fix

Expose Request.json / .text / .arrayBuffer (and .blob/.formData) as bound-method values the way the same gap was closed for native-module methods (#1343 / #1367 / #1368 / #1380) — so typeof req.json === 'function' and req['json']() dispatches. There's likely no untyped dispatch_request_method for the body methods (the typed codegen module=="Request" arm only handles url/method/body/headers properties + the direct .json()/.text() calls added in #1688).

Related

• Web Fetch: Request.text() / Request.json() / Request.arrayBuffer() return 0 instead of the body #1688 (direct-call form, closed), Web Fetch: Request.headers is a numeric handle, not a Headers instance — breaks every Hono adapter #1649, Tracker: Hono on Perry — runtime-agnostic app.fetch contract working end-to-end #1655 (Hono tracker) — blocks the POST /api/echo line.