goldmark-mathjax is an extension for the goldmark that adds both block math and inline math support, and this fork makes some modifications to adjust to Hugo
It translate inline math equation quoted by $ and display math block quoted by $$ into MathJax compatible format.
hyphen _ won't break LaTeX render within a math element any more.
$$
\left[ \begin{array}{a} a^l_1 \\ ⋮ \\ a^l_{d_l} \end{array}\right]
= \sigma(
\left[ \begin{matrix}
w^l_{1,1} & ⋯ & w^l_{1,d_{l-1}} \\
⋮ & ⋱ & ⋮ \\
w^l_{d_l,1} & ⋯ & w^l_{d_l,d_{l-1}} \\
\end{matrix}\right] ·
\left[ \begin{array}{x} a^{l-1}_1 \\ ⋮ \\ ⋮ \\ a^{l-1}_{d_{l-1}} \end{array}\right] +
\left[ \begin{array}{b} b^l_1 \\ ⋮ \\ b^l_{d_l} \end{array}\right])
$$
Borrow the idea from pandoc and this blackfriday PR
The implementation is heavily inspired by the Fenced Code Block and CodeSpan of goldmark
go get github.com/xjzsq/goldmark-mathjax
package main
import (
"bytes"
"fmt"
mathjax "github.com/xjzsq/goldmark-mathjax"
"github.com/yuin/goldmark"
"github.com/yuin/goldmark/parser"
"github.com/yuin/goldmark/renderer/html"
)
func main() {
md := goldmark.New(
goldmark.WithExtensions(mathjax.MathJax),
goldmark.WithParserOptions(
parser.WithAutoHeadingID(),
),
goldmark.WithRendererOptions(
html.WithHardWraps(),
html.WithXHTML(),
),
)
// todo more control on the parsing process
var html bytes.Buffer
mdContent := []byte(`
$$
\mathbb{E}(X) = \int x d F(x) = \left\{ \begin{aligned} \sum_x x f(x) \; & \text{ if } X \text{ is discrete}
\\ \int x f(x) dx \; & \text{ if } X \text{ is continuous }
\end{aligned} \right.
$$
Inline math $\frac{1}{2}$
`)
if err := md.Convert(mdContent, &html); err != nil {
fmt.Println(err)
}
fmt.Println(html.String())
}MIT