From e8fed016a215cd5117aa6b443224bdf244f16aa6 Mon Sep 17 00:00:00 2001
From: Golddirio <jdy2002921@163.com>
Date: Fri, 11 Jul 2025 17:49:15 +0800
Subject: [PATCH 1/2] Make beg_end math delimitor default

---
 .../markbind-plugin-begendMathDelimitor.ts    | 23 +++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 packages/core/src/plugins/default/markbind-plugin-begendMathDelimitor.ts

diff --git a/packages/core/src/plugins/default/markbind-plugin-begendMathDelimitor.ts b/packages/core/src/plugins/default/markbind-plugin-begendMathDelimitor.ts
new file mode 100644
index 0000000000..b02ca0ea52
--- /dev/null
+++ b/packages/core/src/plugins/default/markbind-plugin-begendMathDelimitor.ts
@@ -0,0 +1,23 @@
+import katex from 'katex';
+import md from '../../lib/markdown-it';
+
+const texmath = require('markdown-it-texmath');
+
+let pluginAdded = false;
+
+function applyBegEndDelimiters() {
+  if (!pluginAdded) {
+    // Always use 'beg_end' delimiter regardless of site.json config
+    md.use(texmath, {
+      engine: katex,
+      delimiters: ['beg_end'], // force beg_end delimiter
+    });
+    pluginAdded = true;
+  }
+}
+
+export = {
+  beforeSiteGenerate: () => {
+    applyBegEndDelimiters();
+  },
+};

From 9007072d58bd56eab540ef8b2938527aae94b1a6 Mon Sep 17 00:00:00 2001
From: Golddirio <jdy2002921@163.com>
Date: Sat, 12 Jul 2025 08:37:38 +0800
Subject: [PATCH 2/2] Add the test for begend Math delimitor

---
 .../default/begendMathDelimitor.test.ts       | 29 +++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 packages/core/test/unit/plugins/default/begendMathDelimitor.test.ts

diff --git a/packages/core/test/unit/plugins/default/begendMathDelimitor.test.ts b/packages/core/test/unit/plugins/default/begendMathDelimitor.test.ts
new file mode 100644
index 0000000000..b86a3d11f6
--- /dev/null
+++ b/packages/core/test/unit/plugins/default/begendMathDelimitor.test.ts
@@ -0,0 +1,29 @@
+import md from '../../../../src/lib/markdown-it/index';
+import begEndPlugin from '../../../../src/plugins/default/markbind-plugin-begendMathDelimitor';
+
+describe('begEndPlugin', () => {
+  beforeEach(() => {
+    // Reset the plugin state if needed
+    jest.resetModules();
+  });
+
+  it('should render \\begin{equation} math using beg_end delimiter', () => {
+    // apply the plugin
+    begEndPlugin.beforeSiteGenerate();
+
+    // input using the beg_end math delimiters
+    const input = `
+\\begin{equation}
+  a^2 + b^2 = c^2
+\\end{equation}
+`;
+
+    const output = md.render(input);
+
+    // Check that the output contains KaTeX-rendered math HTML
+    expect(output).toContain('<span class="katex-display">');
+    expect(output).toContain('a^2');
+    expect(output).toContain('b^2');
+    expect(output).toContain('c^2');
+  });
+});