add macros

templates/libs/katex_footer.html

@@ -9,11 +9,24 @@
   src="//cdn.jsdelivr.net/npm/katex@0.16.6/dist/contrib/auto-render.min.js"
   integrity="sha384-+VBxd3r6XgURycqtZ117nYw44OOcIax56Z4dCRWbxyPt0Koah1uHoK0o4+/RRE05"
   crossorigin="anonymous"
-  onload="renderMathInElement(document.body);"
 ></script>
 <script>
   window.addEventListener("load", () => {
     const macros = {};
+    for (const item of new Map(
+      Object.entries({
+        N: "mathbb{N}",
+        R: "mathbb{R}",
+        Z: "mathbb{Z}",
+        O: "Theta",
+        ra: "rightarrow",
+        la: "leftarrow",
+        RA: "Rightarrow",
+        LA: "Leftarrow",
+      })
+    )[Symbol.iterator]()) {
+      macros[`\\${item[0]}`] = `\\${item[1]}`;
+    }
 
     renderMathInElement(document.body, {
       delimiters: [