当更换全局字体时，Mathjax渲染出的公式字体大小会异常。实际原因为Mathjax会自动调整渲染后的字符大小以及位置，与tex-chtml-full.js文件中的matchFontHeight的设置相关。源文件中该属性默认设为了!0，所以需要到源文件中进行修改为0以关闭自动调整，关闭之后上下标等内容存在异常，可以通过js代码进一步调整大小和位置：

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
function func() {
  console.log('Butterfly.js loaded!');
const mjxScripts = document.querySelectorAll('mjx-script');
mjxScripts.forEach(script => {
  console.log(script.parentNode.tagName);
  if (script.parentNode.tagName === 'MJX-MSUB') {
    script.style.cssText = 'vertical-align: -0.2em !important';
  }
  else if (script.parentNode.tagName === 'MJX-MUNDEROVER') {
    script.style.cssText = 'vertical-align: -0.3em !important';
  }
  script.childNodes.forEach(child => {
    if (child.tagName === 'MJX-TEXATOM' || child.tagName === 'MJX-MI' || child.tagName === 'MJX-MN') {
      child.style.cssText = 'font-size: 70.7% !important';
    }
  })
});
const mjxUnder = document.querySelectorAll('mjx-under, mjx-over');
mjxUnder.forEach(under => {
  const texAtom = under.querySelector('mjx-texatom') || under.querySelector('mjx-mi') || under.querySelector('mjx-mn');
  if (texAtom) {
    if (texAtom.tagName === 'MJX-TEXATOM') {
      texAtom.style.cssText = 'font-size: 70.7% !important; padding-left: 0.4em';
    }
    else
    {
      texAtom.style.cssText = 'font-size: 70.7% !important';
    }
  }
});
const mjxSub = document.querySelectorAll('mjx-msub, mjx-msup');
mjxSub.forEach(sub => {
  sub.style.cssText = 'font-size: 100% !important';
});
}

var timesRun = 0;
function clock() {
    timesRun += 1;
    if (document.querySelector("mjx-script")) {
        func();
        clearInterval(int);
    }
    else if (timesRun > 5)
    {
      console.log('MathJax not found!');
      clearInterval(int);
    }
    else
    {
      console.log('Waiting for MathJax...');
    }
}

var int = self.setInterval("clock()", 1000);