以下是重构后的代码:
```javascript
MathJax.Hub.Config({
"HTML-CSS": {
preferredFont: "TeX",
availableFonts: ["STIX", "TeX"],
linebreaks: { automatic: true },
EqnChunk: (MathJax.Hub.Browser.isMobile ? 10 : 50)
},
tex2jax: {
inlineMath: [["$", "$"], ["\\(", "\)"]],
displayMath: [["$$", "$$"], ["\\[", "\\]"]],
processEscapes: true,
ignoreClass: "tex2jax_ignore|dno"
},
TeX: {
noUndefined: { attributes: { mathcolor: "red", mathbackground: "#FFEEEE", mathsize: "90%" } }
},
messageStyle: "none"
});
```