toExternalReference property
An opaque reference to this Object which can be passed to JavaScript.
When compiling to JavaScript, a Dart object is a JavaScript object, and therefore this directly returns the Dart object. When compiling to Wasm, an internal Wasm function is used to convert the Dart object to an opaque JavaScript value.
A value of type ExternalDartReference should be treated as completely opaque. It can only be passed around as-is or converted back using ExternalDartReferenceToObject.toDartObject.
When this getter is called multiple times on the same Dart object, the
underlying references in the resulting ExternalDartReferences are
guaranteed to be equal. Therefore, ==
will always return true between
such ExternalDartReferences. However, like JS types, identical
between
such values may return different results depending on the compiler.
Implementation
external ExternalDartReference get toExternalReference;