🎉 Feat: npm package supported (#2)

package.json

@@ -0,0 +1,23 @@
+{
+  "name": "cell-watermark",
+  "version": "1.0.3",
+  "description": "Create watermark for webpage and automatic adjust when window resize",
+  "main": "src/watermark.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/Lruihao/watermark.git"
+  },
+  "keywords": [
+    "watermark",
+    "cell-watermark"
+  ],
+  "author": "Lruihao",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/Lruihao/watermark/issues"
+  },
+  "homepage": "https://github.com/Lruihao/watermark#readme"
+}

watermark.js → src/watermark.js

@@ -1,6 +1,14 @@
 /* global Watermark */
 
-var Watermark = (function () {
+(function (root, factory) {
+  if (typeof define === 'function' && define.amd) {
+    define([], factory());
+  } else if (typeof module === 'object' && module.exports) {
+    module.exports = factory();
+  } else {
+    root['Watermark'] = factory();
+  }
+})(this, function () {
   var _parentEle;
   var _wmContainer;
   var _wmObserver;
@@ -199,4 +207,4 @@ var Watermark = (function () {
     };
   }
   return Watermark;
-})();
+});