Replace lodash isEqual with recursive check for differences

Author: mattphillips

package.json

@@ -9,9 +9,6 @@
  },
  "author": "Matt Phillips",
  "license": "ISC",
- "dependencies": {
- "lodash": "^4.17.2"
- },
  "devDependencies": {
  "babel-cli": "^6.18.0",
  "babel-core": "^6.18.2",

src/index.js

@@ -1,7 +1,8 @@
-import isEqual from 'lodash/fp/isEqual';
+const isObject = o => typeof o === 'object';
+const isEmpty = o => Object.keys(o).length === 0;
 
 const diff = (lhs, rhs) => {
- if (isEqual(lhs, rhs)) return {};
+ if (lhs === rhs) return {};
 
  if (typeof rhs !== 'object' || rhs === null) return rhs;
 
@@ -14,11 +15,11 @@ const diff = (lhs, rhs) => {
  return rhsKeys.reduce((acc, key) => {
  if (!lhs.hasOwnProperty(key)) return { ...acc, [key]: rhs[key] };
 
- const lhsValue = lhs[key];
- const rhsValue = rhs[key];
- if (isEqual(lhsValue, rhsValue)) return acc;
+ const difference = diff(lhs[key], rhs[key]);
 
- return { ...acc, [key]: diff(lhsValue, rhsValue) };
+ if (isObject(difference) && isEmpty(difference)) return acc;
+
+ return { ...acc, [key]: difference };
  }, deletedValues);
 };