dart:js_util library Null safety

Utility methods to manipulate package:js annotated JavaScript interop objects in cases where the name to call is not known at runtime.

You should only use these methods when the same effect cannot be achieved with @JS() annotations.

Functions

callConstructor<T>(Object constr, List<Object?>? arguments) → T
callMethod<T>(Object o, String method, List<Object?> args) → T
getProperty<T>(Object o, Object name) → T
hasProperty(Object o, Object name) → bool
instanceof(Object? o, Object type) → bool: Check whether o is an instance of type. [...]
jsify(Object object) → dynamic: Recursively converts a JSON-like collection to JavaScript compatible representation. [...]
newObject<T>() → T
promiseToFuture<T>(Object jsPromise) → Future<T>: Converts a JavaScript Promise to a Dart Future. [...]
setProperty<T>(Object o, Object name, T? value) → T

NullRejectionException: Exception for when the promise is rejected with a null or undefined value. [...]