Function jsonCodec

jsonCodec<T>(
    options?: {
        decode?: (value: unknown) => T;
        encode?: (value: T) => unknown;
        typeName?: string;
    },
): Codec<T>
Creates a JSON-wire codec.

Call jsonCodec() with no arguments to encode with JSON.stringify and decode with JSON.parse without structural validation. That identity codec is the default when a Step or RPC omits an explicit codec. Pass decode when the parsed JSON must be validated or converted, such as rebuilding a Date. JSON.stringify semantics apply; undefined, cycles, and unsupported bigint values fail during encoding.
Type Parameters
- T
  Application value type.
Parameters
- options: {
      decode?: (value: unknown) => T;
      encode?: (value: T) => unknown;
      typeName?: string;
  } = {}
  Optional type name and JSON conversion hooks.
  - Optional Readonlydecode?: (value: unknown) => T
    Validates and converts parsed JSON-compatible data; identity by default.
  - Optional Readonlyencode?: (value: T) => unknown
    Converts an application value to JSON-compatible data; identity by default.
  - Optional ReadonlytypeName?: string
    Stable type name used in mapping errors; defaults to json.
Returns Codec<T>
A JSON-wire codec for T.
Example
```
const order = jsonCodec<Order>();
const created = jsonCodec<Date>({
  typeName: "Date",
  decode: (value) => new Date(String(value)),
  encode: (value) => value.toISOString(),
});
```
Throws
TypeError when encoding produces undefined.