What does this image-reference inspection print?

What does this image-reference inspection print?

const image = "node:24-bookworm-slim@sha256:abc123";
const [tag, digest] = image.split("@");

console.log(tag);
console.log(digest.startsWith("sha256:"));

1. node:24-bookworm-slim, then true
2. node, then false
3. sha256:abc123, then true
4. It throws because @ is not valid in an image reference.