feat: simplify computed property with only literals

j4k0xb · Jun 13, 2024 · 5f4ab54 · 5f4ab54
1 parent c1fa1d6
commit 5f4ab54
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diff --git a/packages/webcrack/src/unminify/test/sequence.test.ts b/packages/webcrack/src/unminify/test/sequence.test.ts
@@ -176,3 +176,9 @@ test('rearrange assignment', () => {
     }
   `);
 });
+
+// appears in some obfuscator.io forks
+test('simplify computed property with only literals', () =>
+  expectJS(`
+    Lr[("nnQB", "jcIgN")]();
+  `).toMatchInlineSnapshot('Lr["jcIgN"]();'));
diff --git a/packages/webcrack/src/unminify/transforms/sequence.ts b/packages/webcrack/src/unminify/transforms/sequence.ts
@@ -153,6 +153,15 @@ export default {
           this.changes++;
         },
       },
+      MemberExpression: {
+        exit(path) {
+          const { property } = path.node;
+          if (m.sequenceExpression(m.arrayOf(safeLiteral)).match(property)) {
+            path.get('property').replaceWith(property.expressions.pop()!);
+            this.changes++;
+          }
+        },
+      },
     };
   },
 } satisfies Transform;