From 951770fc689c3f69679c390d31bc9f728f3e8bda Mon Sep 17 00:00:00 2001
From: "Alex Lam S.L" <alexlamsl@gmail.com>
Date: Tue, 4 Apr 2017 03:50:19 +0800
Subject: exclude mangling of special property names (#1779)

- `null`
- `true`
- `false`
- numeric literals
---
 lib/propmangle.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'lib')

diff --git a/lib/propmangle.js b/lib/propmangle.js
index 4e43bb63..b6222990 100644
--- a/lib/propmangle.js
+++ b/lib/propmangle.js
@@ -46,6 +46,9 @@
 function find_builtins() {
     // NaN will be included due to Number.NaN
     var a = [
+        "null",
+        "true",
+        "false",
         "Infinity",
         "-Infinity",
         "undefined",
@@ -159,7 +162,7 @@ function mangle_properties(ast, options) {
         if (options.only_cache) {
             return cache.props.has(name);
         }
-        if (/^[0-9.]+$/.test(name)) return false;
+        if (/^-?[0-9]+(\.[0-9]+)?(e[+-][0-9]+)?$/.test(name)) return false;
         return true;
     }
 
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