Assistive Technology can't be disabled

Created by: plouffed

Issue Summary

I installed my own copy of the project from npm and I am not able to turn off assistive technology. Everything works just fine, but it breaks when I try to disable.

Also, I am confuse about the line sre.Variables.url="https://cdn.jsdelivr.net/npm/speech-rule-engine@"+sre.Variables.VERSION+"/lib/mathmaps in the file es5/sre/sre_browser.js.

Why it doesn't load from my local copy?

Steps to Reproduce:

When I add this configuration:


  MathJax = {
  options: {
    enableEnrichment: false,  // false to disable enrichment
  }
 };

(as the documentation said http://docs.mathjax.org/en/latest/options/accessibility.html)

I get this error:
MathJax(?): Invalid option "enableEnrichment" (no default value).

The same thing happen with this configuration:


  MathJax = {
  options: {
    enableComplexity: false, 
  }
 };

which give this error: MathJax(?): Invalid option "enableComplexity" (no default value).