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Expand on hidelines documentation.

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Eric Huss 2023-05-28 13:50:34 -07:00
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guide/src/format/mdbook.md
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## Hiding code lines ## Hiding code lines
There is a feature in mdBook that lets you hide code lines by prepending them There is a feature in mdBook that lets you hide code lines by prepending them with a specific prefix.
with a `#` [like you would with Rustdoc][rustdoc-hide].
[rustdoc-hide]: https://doc.rust-lang.org/stable/rustdoc/documentation-tests.html#hiding-portions-of-the-example For the Rust language, you can use the `#` character as a prefix which will hide lines [like you would with Rustdoc][rustdoc-hide].
[rustdoc-hide]: https://doc.rust-lang.org/stable/rustdoc/write-documentation/documentation-tests.html#hiding-portions-of-the-example
```bash ```bash
# fn main() { # fn main() {
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# } # }
``` ```
The code block has an eyeball icon (<i class="fa fa-eye"></i>) which will toggle the visibility of the hidden lines. When you tap or hover the mouse over the code block, there will be an eyeball icon (<i class="fa fa-eye"></i>) which will toggle the visibility of the hidden lines.
By default, this only works for code examples that are annotated with `rust`. By default, this only works for code examples that are annotated with `rust`.
However, you can define custom prefixes for other languages by adding a new line-hiding prefix in your `book.toml` with the language name and prefix character(s): However, you can define custom prefixes for other languages by adding a new line-hiding prefix in your `book.toml` with the language name and prefix character(s):
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This behavior can be overridden locally with a different prefix. This has the same effect as above: This behavior can be overridden locally with a different prefix. This has the same effect as above:
~~~bash ~~~markdown
```python,hidelines=!!! ```python,hidelines=!!!
!!!hidden() !!!hidden()
nothidden(): nothidden():