Hello,
The tracing crate documentation has table of content on the right side of the screen: tracing - Rust
How to tell rust doc to generate it? I doesn't appear when I build my own crate locally with cargo doc.
Is this a docs.rs feature?
Do you have this extension installed ? https://rust.extension.sh/
I think what you're seeing is injected by this extension on docs.rs, but not on your localhost.
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The real thing was actually just added to nightly rustdoc: rustdoc: add header map to the table of contents by notriddle · Pull Request #120736 · rust-lang/rust · GitHub
Newly built crates have it, like nightly std.
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