Alright, good to know that it’s working now.
As for how to split, it depends on what you want to achieve and what you are splitting. I can’t really help you without that information. But in any case, you shouldn’t put tp in this line: tp.newTitle.split(`-`)[1]. Also, you need to save it to a new variable, so that you don’t split the newTitle that you want to rename the file to. So it would be something like:
<%*
const title = tp.file.title;
let splitTitle;
if (title.startsWith("Untitled")) {
newTitle = await tp.system.prompt("Enter note title");
splitTitle = newTitle.split(`-`)[1].trim();
await tp.file.rename(newTitle);
}
-%>
---
splitTitle: <% splitTitle %>
---
If you are looking to save the second part after the -, then this looks right. I added a .trim() to remove unwanted whitespace.
If you don’t want to be prompted for a title, but were actually using tp.file.rename in folder templates before with predetermined titles, and that’s what you wanted, you could try fetching the title using tp.config.target_file.basename, like @TheTao recommended. However, in this case, you wouldn’t need to split anything, since it’s already predetermined, and you could just put that info directly in the templates frontmatter.