From 0816b78670a0ad77aa964305ea165a81c21148dc Mon Sep 17 00:00:00 2001
From: kzc <kzc@users.noreply.github.com>
Date: Fri, 19 May 2017 00:41:29 -0400
Subject: [PATCH] add minify warnings example

---
 README.md | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index a7635095..e0d959fa 100644
--- a/README.md
+++ b/README.md
@@ -319,9 +319,20 @@ var result = UglifyJS.minify({
 console.log(result.code);
 ```
 
+To produce warnings:
+```
+var result = UglifyJS.minify("function f(){ var u; return 5; }", {
+    warnings: true
+});
+console.log(result.code);     // function f(){return 5}
+console.log(result.warnings); // [ 'Dropping unused variable u [0:1,18]' ]
+console.log(result.error);    // runtime error, not defined in this case
+```
+
 ## Minify options
 
-- `warnings` (default `false`) — pass `true` to display compressor warnings.
+- `warnings` (default `false`) — pass `true` to return compressor warnings 
+  in `result.warnings`. Use the value `"verbose"` for more detailed warnings.
 
 - `parse` (default `{}`) — pass an object if you wish to specify some
   additional [parse options](#parse-options).