description

# instanceOfString method

bool instanceOfString(

1. String constructorName

)

Whether this `JSAny?` is an `instanceof` the constructor that is defined by `constructorName`, which is looked up in the globalContext.

If `constructorName` contains '.'s, the name is split into several parts in order to get the constructor. For example, `library1.JSClass` would involve fetching `library1` off of the globalContext, and then fetching `JSClass` off of `library1` to get the constructor.

If `constructorName` is empty or any of the parts or the constructor don't exist, returns false.

## Implementation

    bool instanceOfString(String constructorName) {
      if (constructorName.isEmpty) return false;
      final parts = constructorName.split('.');
      JSObject? constructor = globalContext;
      for (final part in parts) {
        constructor = constructor?[part] as JSObject?;
        if (constructor == null) return false;
      }
      return instanceof(constructor as JSFunction);
    }