More supports of MathJax3

_config.yml

@@ -519,6 +519,19 @@ math:
     enable: false
     # See: https://mhchem.github.io/MathJax-mhchem/
     mhchem: false
+    # For hexo-renderer-marked, the default renderer of Hexo, some math equations with
+    # multiple subscribe mark of LaTeX (say, the underscore `_`) might cause problems.
+    # Enable this flag could bypass this problem by wrap your math codes in the inline-math_in_verbatim
+    # marks of Markdown, say, the backquote pair.
+    # For example,
+    # ```
+    # $ E = mc^2 $.
+    # ```
+    # could be replaced by
+    # ```
+    # `$ E = mc^2 $`.
+    # ```
+    math_in_verbatim: false
 
   # hexo-renderer-markdown-it-plus (or hexo-renderer-markdown-it with markdown-it-katex plugin) required for full Katex support.
   katex:

layout/_third-party/math/mathjax.swig

@@ -1,17 +1,33 @@
 {%- set mathjax_uri = theme.vendors.mathjax or '//cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js' %}
 
 <script>
+  {%- if theme.math.mathjax.math_in_verbatim %}
+    document.querySelectorAll('code').forEach(code => {
+      const text = code.innerHTML;
+      // is_inline_math  = /^\$(.*)\$$/.exec(text) || /^\\\((.*)\\\)$/.exec(text);
+      // is_display_math = /^\$\$(.*)\$\$$/ms.exec(text) || /^\\begin\{.+\}(.*)\\end\{.+\}/ms.exec(text);
+      if (/^\$\$(.*)\$\$$/ms.exec(text) || /^\\begin\{.+\}(.*)\\end\{.+\}/ms.exec(text)) {
+        code.outerHTML = "<span class='theme_next_mathjax_display has-jax'>" + text + "</span>";
+      } else if (/^\$(.*)\$$/.exec(text) || /^\\\((.*)\\\)$/.exec(text)) {
+        code.outerHTML = "<span class='theme_next_mathjax_inline has-jax'>"  + text + "</span>";
+      }
+    });
+  {%- endif %}
   if (typeof MathJax === 'undefined') {
     window.MathJax = {
-      {%- if theme.math.mathjax.mhchem %}
-        loader: {
-          load: ['[tex]/mhchem']
-        },
-      {%- endif %}
+      loader: {
+        {%- if theme.math.mathjax.mhchem %}
+          load: ['[tex]/ams', '[tex]/mhchem'],
+        {%- else %}
+          load: ['[tex]/ams'],
+        {%- endif %}
+      },
       tex: {
         inlineMath: {'[+]': [['$', '$']]},
         {%- if theme.math.mathjax.mhchem %}
-          packages: {'[+]': ['mhchem']},
+          packages: {'[+]': ['ams', 'mhchem']},
+        {%- else %}
+          packages: {'[+]': ['ams']},
         {%- endif %}
         tags: 'ams'
       },