init

checkMutation.js

@@ -0,0 +1,5 @@
+var t = require('./main.js')
+module.exports = ()=>{
+    console.log(t.name);
+    console.log(t.checkGrade());
+}

index.js

@@ -0,0 +1,4 @@
+var t = require('./main.js');
+t.name = "dawg";
+t.checkGrade = ()=>100
+require('./checkMutation.js')();

main.js

@@ -0,0 +1,4 @@
+module.exports = {
+    name:"tommy",
+    checkGrade: ()=>10
+}

package.json

@@ -0,0 +1,11 @@
+{
+  "name": "nodemutate",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "license": "ISC"
+}