diff --git a/demo/client.ts b/demo/client.ts
index 033ea41b..67ad0284 100644
--- a/demo/client.ts
+++ b/demo/client.ts
@@ -220,6 +220,7 @@ if (document.location.pathname === '/test') {
   document.getElementById('custom-glyph').addEventListener('click', writeCustomGlyphHandler);
   document.getElementById('load-test').addEventListener('click', loadTest);
   document.getElementById('print-cjk').addEventListener('click', addCjk);
+  document.getElementById('print-cjk-sgr').addEventListener('click', addCjkRandomSgr);
   document.getElementById('powerline-symbol-test').addEventListener('click', powerlineSymbolTest);
   document.getElementById('underline-test').addEventListener('click', underlineTest);
   document.getElementById('ansi-colors').addEventListener('click', ansiColorsTest);
@@ -989,6 +990,25 @@ function addCjk(): void {
   }
 }
 
+/**
+ * Prints the 20977 characters from the CJK Unified Ideographs unicode block with randomized styles.
+ */
+function addCjkRandomSgr(): void {
+  term.write('\n\n\r');
+  for (let i = 0x4E00; i < 0x9FCC; i++) {
+    term.write(`\x1b[${getRandomSgr()}m${String.fromCharCode(i)}\x1b[0m`);
+  }
+}
+const randomSgrAttributes = [
+  '1', '2', '3', '4', '5', '6', '7', '9',
+  '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'
+];
+function getRandomSgr(): string {
+  return randomSgrAttributes[Math.floor(Math.random() * randomSgrAttributes.length)];
+}
+
 function addDecoration(): void {
   term.options['overviewRulerWidth'] = 15;
   const marker = term.registerMarker(1);
diff --git a/demo/index.html b/demo/index.html
index 26dcc53d..f62d535c 100644
--- a/demo/index.html
+++ b/demo/index.html
@@ -75,6 +75,7 @@
               <dt>Performance</dt>
               <dd><button id="load-test" title="Write several MB of data to simulate a lot of data coming from the process">Load test</button></dd>
               <dd><button id="print-cjk" title="Prints the 20977 characters from the CJK Unified Ideographs unicode block">CJK Unified Ideographs</button></dd>
+              <dd><button id="print-cjk-sgr" title="Prints the 20977 characters from the CJK Unified Ideographs unicode block with randomized SGR attributes">CJK Unified Ideographs (random SGR)</button></dd>
 
               <dt>Styles</dt>
               <dd><button id="custom-glyph" title="Write custom box drawing and block element characters to the terminal">Test custom glyphs</button></dd>