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feat: Upgrades to MathJax version 3 and supports setting different configuration files (defaults to 'tex-mml-chtml'). #2285

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3 changes: 3 additions & 0 deletions guide/src/format/configuration/renderers.md
Original file line number Diff line number Diff line change
Expand Up @@ -99,6 +99,7 @@ default-theme = "light"
preferred-dark-theme = "navy"
curly-quotes = true
mathjax-support = false
mathjax-config = "tex-mml-chtml"
copy-fonts = true
additional-css = ["custom.css", "custom2.css"]
additional-js = ["custom.js"]
Expand Down Expand Up @@ -126,6 +127,8 @@ The following configuration options are available:
that occur in code blocks and code spans. Defaults to `false`.
- **mathjax-support:** Adds support for [MathJax](../mathjax.md). Defaults to
`false`.
- **mathjax-config:** The [configuration file](https://docs.mathjax.org/en/latest/web/components/combined.html)
used by MathJax. Defaults to `tex-mml-chtml`.
- **copy-fonts:** (**Deprecated**) If `true` (the default), mdBook uses its built-in fonts which are copied to the output directory.
If `false`, the built-in fonts will not be used.
This option is deprecated. If you want to define your own custom fonts,
Expand Down
3 changes: 3 additions & 0 deletions src/config.rs
Original file line number Diff line number Diff line change
Expand Up @@ -530,6 +530,8 @@ pub struct HtmlConfig {
pub curly_quotes: bool,
/// Should mathjax be enabled?
pub mathjax_support: bool,
/// The configuration file used by MathJax, defaults to 'tex-mml-chtml'.
pub mathjax_config: Option<String>,
/// Whether to fonts.css and respective font files to the output directory.
pub copy_fonts: bool,
/// An optional google analytics code.
Expand Down Expand Up @@ -592,6 +594,7 @@ impl Default for HtmlConfig {
preferred_dark_theme: None,
curly_quotes: false,
mathjax_support: false,
mathjax_config: Some(String::from("tex-mml-chtml")),
copy_fonts: true,
google_analytics: None,
additional_css: Vec::new(),
Expand Down
4 changes: 4 additions & 0 deletions src/renderer/html_handlebars/hbs_renderer.rs
Original file line number Diff line number Diff line change
Expand Up @@ -667,6 +667,10 @@ fn make_data(
if html_config.mathjax_support {
data.insert("mathjax_support".to_owned(), json!(true));
}
data.insert(
"mathjax_config".to_owned(),
json!(html_config.mathjax_config.clone().unwrap_or_default()),
);

// This `matches!` checks for a non-empty file.
if html_config.copy_fonts || matches!(theme.fonts_css.as_deref(), Some([_, ..])) {
Expand Down
2 changes: 1 addition & 1 deletion src/theme/index.hbs
Original file line number Diff line number Diff line change
Expand Up @@ -50,7 +50,7 @@

{{#if mathjax_support}}
<!-- MathJax -->
<script async src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>
<script async src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/{{ mathjax_config }}.js"></script>
{{/if}}
</head>
<body class="sidebar-visible no-js">
Expand Down