dpvc
commented
7 years ago In MathJax, because the em and ex sizes are approximations (determined empirically), full-width equations are hard to handle properly; if the ex-size is a little too big, then the width of the full-width equation could be slightly too wide for its container, causing scroll bars on the container when there should be any. So MathJax adds a max-width style in pixels (not ex) to prevent that.
In mathjax-node, the width and ex-size are set by the configuration rather than measuring the actual location in the page, so these values have to be set properly for the page you are using in order for that to work properly. The default ex-size is 6 pixels, but that might not match the ex size of the font used in your page (the default font in my browser appears to have an ex of about 8.72 pixels). So that means the max-width is likely to cause full-width equations to be restricted to an unusually small width, forcing the equation to be scaled down.
So there are two possible solutions: first, use the proper ex-size and width in the configuration. Alternatively, you could remove the min-width style after the fact. For example,
mjAPI.typeset({
math: one,
format: "TeX",
svg: true,
equationNumbers: "AMS"
}, function (data) {
console.log(data.svg.replace(/ max-width: [^;"]*/,''));
});in your code above.
pkra
Originally reported at https://github.com/pkra/mathjax-node-page/issues/47.
Adding a label makes the equation appear to be noticeably smaller (as if the font-size was smaller).
Example:
Produces
and