diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..80399bc
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,24 @@
+{
+  "name": "vue_demo",
+  "lockfileVersion": 2,
+  "requires": true,
+  "packages": {
+    "": {
+      "dependencies": {
+        "pubsub-js": "^1.9.4"
+      }
+    },
+    "node_modules/pubsub-js": {
+      "version": "1.9.4",
+      "resolved": "https://registry.npmmirror.com/pubsub-js/-/pubsub-js-1.9.4.tgz",
+      "integrity": "sha512-hJYpaDvPH4w8ZX/0Fdf9ma1AwRgU353GfbaVfPjfJQf1KxZ2iHaHl3fAUw1qlJIR5dr4F3RzjGaWohYUEyoh7A=="
+    }
+  },
+  "dependencies": {
+    "pubsub-js": {
+      "version": "1.9.4",
+      "resolved": "https://registry.npmmirror.com/pubsub-js/-/pubsub-js-1.9.4.tgz",
+      "integrity": "sha512-hJYpaDvPH4w8ZX/0Fdf9ma1AwRgU353GfbaVfPjfJQf1KxZ2iHaHl3fAUw1qlJIR5dr4F3RzjGaWohYUEyoh7A=="
+    }
+  }
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..34cdd3d
--- /dev/null
+++ b/package.json
@@ -0,0 +1,5 @@
+{
+  "dependencies": {
+    "pubsub-js": "^1.9.4"
+  }
+}