When using the image component, it is possible to load the image via http by specifying a network address as the source property.

Image {
  sourceSize: Qt.size(topLevel.sourceSize, topLevel.sourceSize)
  source: "https://upload.wikimedia.org/wikipedia/commons/4/42/Love_Heart_SVG.svg"
} 

With VectorImage this does not work:

VectorImage {
  width: topLevel.sourceSize
  height: topLevel.sourceSize
  preferredRendererType: VectorImage.CurveRenderer
  source: "https://upload.wikimedia.org/wikipedia/commons/4/42/Love_Heart_SVG.svg"
} 

When setting an invalid http URL, we do not receive an error message in the console, i.e. the network sources are apparently ignored.

Nothing is mentioned in the help for VectorImage source.

The attached project is the VectorImage example with http url as source.