I have found the following guide for getting the content of the current file:
const noteFile = this.app.workspace.getActiveFile(); // Currently Open Note
if(!noteFile.name) return; // Nothing Open
// Read the currently open note file. We are reading it off the HDD - we are NOT accessing the editor to do this.
let text = await this.app.vault.read(noteFile);
How can I remove YAML frontmatter from this? Or is there another way to get the file content so that YAML is already filtered out?
In theory, I could try to come up with a regular expression that would strip away everything that is between two --- lines (with the first --- line being the very first thing in the file). I just don’t think it’s a good idea to do this kind of thing myself, as it can be errorprone, and I would guess Obsidian already does a split like this. I just don’t know if there is API access for it.
I’ve been able to use the cached frontmatter information to do that
This is the relevant code (note that error checking is not present):
const file = app.workspace.getActiveFile();
let text = editor.getDoc().getValue()
let fmc = app.metadataCache.getFileCache(file)?.frontmatter;
let end = fmc.position.end.line + 1 // accont for ending ---
body = text.split("\n").slice(end).join("\n")
Thank you @endorama ! It took quite some time before I finally tried this. It’s working perfectly!
If it’s ok to you, I’ll use this in my Shell commands plugin, where I’ll create a new variable named {{note_content}} that allows users to pass current note’s content (without YAML) as input to system commands they execute.
const file = app.workspace.getActiveFile();
let text = editor.getDoc().getValue()
let position = app.metadataCache.getFileCache(file)?.frontmatterPosition;
let end = position.end.line + 1 // accont for ending ---
body = text.split("\n").slice(end).join("\n")
MetadataCache can be slightly outdated (especially when editing yaml using source mode), so I’d use @pellucid’s approach. But be careful, that pattern will also match 'before --- middle --- after' for example.
After all, all you have to do is just split the content into lines, check if the first line’s content is ---, and find the next --- line.
@ush the .replace() function only replaces the first instance of the match, and since frontmatter always occurs at the very beginning of the note there’s not any danger of extra stuff being replaced.
Also, off topic, but I think your plugins are really cool
the .replace() function only replaces the first instance of the match, and since frontmatter always occurs at the very beginning of the note there’s not any danger of extra stuff being replaced.
The problem is that --- can be a horizontal rule, not a front matter.
In the example below, the “I’m interested in Obsidian” section is removed.
It took quite some time before I finally tried this. It’s working perfectly! 
