toJs()

toJs(dart, check?): any

Defined in: js-api/src/wrappers_impl.ts:58

Converts a Dart object to its JavaScript wrapper or native JS value.

Type conversion rules:

• null/undefined -> passed through
• FLOAT_NULL sentinel -> null
• Map -> plain object with recursively converted values
• List -> array via paramsToJs
• DG.TypedEventArgs -> TypedEventArgs wrapper
• DateTime -> dayjs object
• ByteArray -> passed through unchanged
• BigInt -> JavaScript BigInt
• Objects with existing wrappers -> returns the wrapper
• Property -> Property wrapper

Parameters

Parameter	Type	Default value	Description
dart	any	undefined	Dart object handle
check	boolean	false	When true, throws an exception if the type cannot be converted

Returns

any

JavaScript wrapper, native JS value, or the original Dart handle

Throws

Error if check is true and type is not supported

See

• toDart for the reverse operation
• ./dart-interop.md for full documentation