Is there a programmatic test for whether a function is supported?

[hrbigelow]

Hi,

I wondered if there is some programmatic test for whether a function is supported, instead of looking at https://katex.org/docs/supported.html.

Thanks

[edemaine]

I believe the following code will work, e.g. supported('\\foo'):

function supported (command) {
  let rendered;
  try {
    rendered = katex.renderToString(command, {throwOnError: false, errorColor: 'INVALID'});
  } catch {
    return true;
  }
  return !/color:INVALID/.test(rendered);
}

[hrbigelow]

Great, that seems to work, thank you @edemaine