Render a latex equation to a raw svg string.

to_svg.jl

using LaTeXStrings

function to_svg(formula::LaTeXString ; preamble="\\usepackage{amsmath}")
    text="""
    \\documentclass[border=2pt]{standalone}
    $(preamble)
    \\usepackage{varwidth}
    \\begin{document}
    \\begin{varwidth}{\\linewidth}
    $(String(formula))
    \\end{varwidth}
    \\end{document}
    """
    
    text = try 
        f = tempname()
        dir,_ = splitdir(f)
        write(f, text)

        run(`pdflatex -output-directory=$(dir) $(f)`)
        
        run(`pdf2svg $(f).pdf $(f).svg`)

        open("$(f).svg") do svg
            return read(svg, String)
        end
    catch e
        println("Failed to execute conversion with error: $(e)")
        ""
    end

    return text
end