From a96f087ac33b6d18d5ffa3cacd39dd693defb7cf Mon Sep 17 00:00:00 2001
From: "Alex Lam S.L" <alexlamsl@gmail.com>
Date: Thu, 17 Dec 2020 10:23:41 +0000
Subject: support arrow function (#4385)

---
 README.md | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'README.md')

diff --git a/README.md b/README.md
index c65229fa..4753b4c2 100644
--- a/README.md
+++ b/README.md
@@ -1209,3 +1209,11 @@ To allow for better optimizations, the compiler makes various assumptions:
   `function({}, arguments) {}` will result in `SyntaxError` in earlier versions
   of Chrome and Node.js - UglifyJS may modify the input which in turn may
   suppress those errors.
+- Later versions of JavaScript will throw `SyntaxError` with the following:
+  ```js
+  a => {
+    let a;
+  };
+  // SyntaxError: Identifier 'a' has already been declared
+  ```
+  UglifyJS may modify the input which in turn may suppress those errors.
-- 
cgit v1.2.3