Function validateJson

Middleware that validates a request's route params, query and/or body against JSON Schemas (AJV, with ajv-formats and ajv-errors). On failure it answers status (400) with the errors by field; on success the handler reads the data from c.get("validated"). A JSON Schema does not carry a TypeScript type, so give the validated shapes as type parameters:

app.post("/users", validateJson<{ name: string }>({ body: userSchema }), (c) => {
    const { name } = c.get("validated").body;
});
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