MathML support

[severny-polus]

It would be helpful if you add MathML support instead of MathJax. It is supported by almost all modern browsers and does not require JavaScript at all.

[kensanata]

Looking at the block.go file, it seems that using <math>…</math> is already supported?

[kjk]

I don't know those details off the top of my head.

Write a test and see what happens. You can start with https://tools.arslexis.io/goplayground/#txO7hJ-ibeU

Looking at this issue, I don't know what support MathML means.

I need to see the markdown, the expected html output and what we output. And also a link to https://babelmark.github.io/ with the same markdown.

Then we can discuss if this is the right behavior and how to fix if it's not the right behavior.

[kensanata]

I added the following test to my block_test.go file, based on the spec:

// Inside MATH, so the other elements are passed through.
func TestMath(t *testing.T) {
	input := `# Some expression

<math><mtext>2 * x</mtext></math>
`
	p := NewWithExtensions(CommonExtensions)
	doc := p.Parse([]byte(input))
	var buf bytes.Buffer
	ast.Print(&buf, doc)
	got := buf.String()
	exp := "Heading\n  Text 'Some expression'\nHTMLBlock '<math><mtext>2 * x</mtext></math>'\n"
	if got != exp {
		t.Errorf("\nInput   [%#v]\nExpected[%#v]\nGot     [%#v]\n",
			input, exp, got)
	}
}

(This test, like the others, could be written data driven – right now it follows the examples in block_table_test.go…)

Perhaps the key is that people want to remove the MathJax option. An example like the following could be added to the documentation somewhere (this is from my own project):

	extensions := (parser.CommonExtensions | parser.AutoHeadingIDs | parser.Attributes) & ^parser.MathJax
	parser := parser.NewWithExtensions(extensions)

This assumes that I understand @severny-polus's issue correctly.

[kjk]

I might be wrong but I suppose what he means is: generate MathML syntax from MathJax syntax in markdown. But I'm just guessing, the request is vague.

[kensanata]

Oof, a LaTeX to MathML converter? That's going to be super tough, I think.