enhance assignments (#3612)

2019-11-28 07:40:34 +08:00
parent 168ae747ad
commit 5a88c30d65
2 changed files with 40 additions and 6 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -6720,8 +6720,8 @@ merge(Compressor.prototype, {
                self.right = self.right.left;
            }
        }
-        if ((self.operator == "+=" || self.operator == "-=")
-            && self.left.is_number(compressor)
+        if ((self.operator == "-=" || self.operator == "+="
+                && (self.left.is_boolean(compressor) || self.left.is_number(compressor)))
            && self.right instanceof AST_Number
            && self.right.getValue() === 1) {
            var op = self.operator.slice(0, -1);