The screenshots make it pretty clear that it's the latter. That's what Tauri is: an electron competitor that differentiates on a) using native WebViews to great

The screenshots make it pretty clear that it's the latter. That's what Tauri is: an electron competitor that differentiates on a) using native WebViews to greatly reduce distribution size and b) using Rust as the backend to do all of the things that Rust does and none of the things that Node does.