Supported Types

All structured-clonable types are supported via devalue:

Type	Example
string	"hello"
number	3.14, NaN, Infinity, -0
boolean	true, false
null	null
undefined	undefined
Date	new Date()
RegExp	/pattern/gi
Map	new Map([["a", 1]])
Set	new Set([1, 2, 3])
BigInt	42n
URL	new URL("https://example.com")
URLSearchParams	new URLSearchParams("a=1")
ArrayBuffer	new ArrayBuffer(8)
TypedArrays	Uint8Array, Int32Array, Float64Array, etc.
Nested objects	{ a: { b: [1, 2] } }
Arrays	[1, "two", null]
Circular references	Handled automatically

Not supported

Type	Reason
Function	Cannot be serialized. Use exports instead.
WeakMap / WeakRef	Non-enumerable by design
DOM nodes	Browser-only objects

Streaming types

These are proxied rather than serialized:

Type	Direction
ReadableStream	Server to client
AsyncIterator / AsyncGenerator	Server to client