#46 $.extend change to pure javascript

src/editor/components/jgraduate/Util.js

@@ -13,4 +13,25 @@ export function findPos (obj) {
     return {left: curleft, top: curtop};
   }
   return {left: curleft, top: curtop};
+}
+
+export function isObject(item) {
+  return (item && typeof item === 'object' && !Array.isArray(item));
+}
+
+export function mergeDeep(target, source) {
+  let output = Object.assign({}, target);
+  if (isObject(target) && isObject(source)) {
+    Object.keys(source).forEach(key => {
+      if (isObject(source[key])) {
+        if (!(key in target))
+          Object.assign(output, { [key]: source[key] });
+        else
+          output[key] = mergeDeep(target[key], source[key]);
+      } else {
+        Object.assign(output, { [key]: source[key] });
+      }
+    });
+  }
+  return output;
 }