Merge pull request #2729 from PR0M3TH3AN/security-fix-qrcode-innerhtml-16143867429725848701

Refactor qrcode.js to eliminate unsafe innerHTML usage

js/utils/qrcode.js

@@ -337,8 +337,13 @@ if (hasDocument) {
 			var nWidth = Math.floor(_htOption.width / nCount);
 			var nHeight = Math.floor(_htOption.height / nCount);
 
-			var table = document.createElement("table");
-			table.className = "qr-code__table";
+			// Clear existing content
+			while (_el.firstChild) {
+				_el.removeChild(_el.firstChild);
+			}
+
+			var elTable = document.createElement("table");
+			elTable.className = "qr-code__table";
 
 			updateQrCodeContainerStyles(_el, {
 				colorDark: _htOption.colorDark,
@@ -349,27 +354,22 @@ if (hasDocument) {
 			});
 			
 			for (var row = 0; row < nCount; row++) {
-				var tr = document.createElement("tr");
+				var elRow = document.createElement("tr");
 				
 				for (var col = 0; col < nCount; col++) {
-					var td = document.createElement("td");
-					td.className = oQRCode.isDark(row, col)
+					var elCell = document.createElement("td");
+					elCell.className = oQRCode.isDark(row, col)
 						? "qr-code__cell qr-code__cell--dark"
 						: "qr-code__cell";
-					tr.appendChild(td);
+					elRow.appendChild(elCell);
 				}
 				
-				table.appendChild(tr);
+				elTable.appendChild(elRow);
 			}
 			
-			// Clear previous content
-			while (_el.firstChild) {
-				_el.removeChild(_el.firstChild);
-			}
-			_el.appendChild(table);
+			_el.appendChild(elTable);
 			
 			// Fix the margin values as real size.
-			var elTable = table;
 			var nLeftMarginTable = (_htOption.width - (nCount * nWidth)) / 2;
 			var nTopMarginTable = (_htOption.height - (nCount * nHeight)) / 2;
 			

tests/qrcode_table_fallback.test.mjs

@@ -1,26 +1,29 @@
-import { test, describe } from 'node:test';
+import { test } from 'node:test';
 import assert from 'node:assert';
 import { JSDOM } from 'jsdom';
 
-describe('QRCode Table Fallback', () => {
-  test('should generate table when Canvas is not supported', async () => {
+test('QR Code Table Fallback', async (t) => {
+    // Setup JSDOM
     const dom = new JSDOM(`<!DOCTYPE html><body><div id="qrcode"></div></body>`);
 
-    // Set up global environment for the library
-    global.document = dom.window.document;
+    // Override globals to simulate browser environment provided by JSDOM
+    // We need to override what setup-localstorage.mjs might have set
     global.window = dom.window;
+    global.document = dom.window.document;
     global.HTMLStyleElement = dom.window.HTMLStyleElement;
     global.HTMLElement = dom.window.HTMLElement;
-    global.WeakMap = dom.window.WeakMap || global.WeakMap;
-    global.Map = dom.window.Map || global.Map;
 
-    // Ensure CanvasRenderingContext2D is NOT defined to trigger table fallback
-    delete global.CanvasRenderingContext2D;
-    delete global.window.CanvasRenderingContext2D;
+    // Copy other properties if needed, but these should be enough for qrcode.js
 
-    // Ensure we are not in SVG mode (JSDOM default is HTML)
+    // Ensure CanvasRenderingContext2D is NOT defined to trigger the table fallback
+    if (global.CanvasRenderingContext2D) {
+        delete global.CanvasRenderingContext2D;
+    }
+    if (global.window.CanvasRenderingContext2D) {
+        delete global.window.CanvasRenderingContext2D;
+    }
 
-    // Import the module dynamically
+    // Dynamically import the module to ensure it uses the current environment
     const { createQrCode } = await import('../js/utils/qrcode.js');
 
     const el = global.document.getElementById('qrcode');
@@ -28,16 +31,14 @@ describe('QRCode Table Fallback', () => {
     // Create QR code
     createQrCode(el, { text: "test", width: 100, height: 100 });
 
-    // Verify table is used
+    // Verify table is used (this confirms we hit the refactored code path)
     const table = el.querySelector('table');
-    assert.ok(table, "Table element should be created");
+    assert.ok(table, "Table should be created when canvas is not supported");
     assert.ok(table.classList.contains('qr-code__table'), "Table should have correct class");
 
-    // Check for table structure
     const rows = table.querySelectorAll('tr');
     assert.ok(rows.length > 0, "Should have rows");
 
     const cells = table.querySelectorAll('td');
     assert.ok(cells.length > 0, "Should have cells");
-  });
 });