docs: only enable __coverage__ plugin in test env. (istanbuljs#280)

cschanaj · Jun 15, 2016 · 07d78c5 · 07d78c5
1 parent 6de49bf
commit 07d78c5
Showing 1 changed file with 7 additions and 1 deletion.
diff --git a/README.md b/README.md
@@ -70,11 +70,17 @@ the `sourceMaps` option to `inline`.
     {
       "babel": {
         "presets": ["es2015"],
-        "plugins": ["__coverage__"]
+        "env": {
+          "test": {
+            "plugins": ["__coverage__"]
+          }
+        }
       }
     }
   ```
 
+  Note: With this configuration, the `__coverage__` will only be active when `NODE_ENV` or `BABEL_ENV` is `test`.
+
 2. disable nyc's instrumentation and source-maps:
 
   ```json