javascript-obfuscator · sanex3339 · Mar 22, 2026 · Mar 22, 2026
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,5 +1,9 @@
 Change Log
 
+v5.4.1
+---
+* Fixed missing space between keywords (`return`, `throw`, `typeof`) and Unicode surrogate pair identifiers in compact mode. Fixes https://github.com/javascript-obfuscator/javascript-obfuscator/issues/1112
+
 v5.4.0
 ---
 * Add support for `import attributes`. Fixes https://github.com/javascript-obfuscator/javascript-obfuscator/issues/1256

diff --git a/package.json b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "javascript-obfuscator",
-  "version": "5.4.0",
+  "version": "5.4.1",
   "description": "JavaScript obfuscator",
   "keywords": [
     "obfuscator",
@@ -21,7 +21,7 @@
   },
   "types": "typings/index.d.ts",
   "dependencies": {
-    "@javascript-obfuscator/escodegen": "2.4.0",
+    "@javascript-obfuscator/escodegen": "2.4.1",
     "@javascript-obfuscator/estraverse": "5.4.0",
     "@vercel/blob": ">=0.23.0",
     "acorn": "8.15.0",

diff --git a/test/functional-tests/issues/fixtures/issue1112.js b/test/functional-tests/issues/fixtures/issue1112.js
@@ -0,0 +1,3 @@
+(function(𝐜𝐨𝐧𝐭𝐞𝐱𝐭) {
+    return 𝐜𝐨𝐧𝐭𝐞𝐱𝐭;
+})(42)
diff --git a/test/functional-tests/issues/issue1112.spec.ts b/test/functional-tests/issues/issue1112.spec.ts
@@ -0,0 +1,39 @@
+import { assert } from 'chai';
+import { NO_ADDITIONAL_NODES_PRESET } from '../../../src/options/presets/NoCustomNodes';
+import { readFileAsString } from '../../helpers/readFileAsString';
+import { JavaScriptObfuscator } from '../../../src/JavaScriptObfuscatorFacade';
+
+//
+// https://github.com/javascript-obfuscator/javascript-obfuscator/issues/1112
+//
+describe('Issue #1112', () => {
+    describe('Unicode mathematical bold identifiers should have correct spacing after keywords', () => {
+        let testFunc: () => void;
+
+        before(() => {
+            const code: string = readFileAsString(__dirname + '/fixtures/issue1112.js');
+
+            testFunc = () => {
+                const obfuscatedCode: string = JavaScriptObfuscator.obfuscate(code, {
+                    ...NO_ADDITIONAL_NODES_PRESET,
+                    reservedNames: ['𝐜𝐨𝐧𝐭𝐞𝐱𝐭'],
+                    compact: true,
+                    seed: 1
+                }).getObfuscatedCode();
+
+                const result = eval(obfuscatedCode);
+
+                if (result !== 42) {
+                    throw new Error(
+                        `Expected 42, got ${result}. ` +
+                        `Missing space between keyword and Unicode identifier.`
+                    );
+                }
+            };
+        });
+
+        it('should produce valid code with Unicode surrogate pair identifiers', () => {
+            assert.doesNotThrow(testFunc);
+        });
+    });
+});
diff --git a/yarn.lock b/yarn.lock
@@ -329,10 +329,10 @@
   resolved "https://registry.yarnpkg.com/@istanbuljs/schema/-/schema-0.1.3.tgz#e45e384e4b8ec16bce2fd903af78450f6bf7ec98"
   integrity sha512-ZXRY4jNvVgSVQ8DL3LTcakaAtXwTVUxE81hslsyD2AtoXW/wVob10HkOJ1X/pAlcI7D+2YoZKg5do8G/w6RYgA==
 
-"@javascript-obfuscator/escodegen@2.4.0":
-  version "2.4.0"
-  resolved "https://registry.yarnpkg.com/@javascript-obfuscator/escodegen/-/escodegen-2.4.0.tgz#9d2b19b94793106cafa5cd5041c4e40d42943fb7"
-  integrity sha512-h9cJ/qb3Y3c1jMQPWypt2CGTFgP34V5OtWLqoOCjV6CT/DUXMZFpoTAfDHpuUrRP0oxNd0UwnVAsPtPuYsoXxQ==
+"@javascript-obfuscator/escodegen@2.4.1":
+  version "2.4.1"
+  resolved "https://registry.yarnpkg.com/@javascript-obfuscator/escodegen/-/escodegen-2.4.1.tgz#6062541cb3027912e9304dd15f8a5ee5946de247"
+  integrity sha512-YrEJJDr4cb+pIQKWzHFoDlDkQzatcrNB6OhAD6iTSwiKwzZUMVdobwbOuLpF4EiLxUj0qP28Xl1saTHYzIPCLg==
   dependencies:
     "@javascript-obfuscator/estraverse" "^5.3.0"
     esprima "^4.0.1"