planning

node_modules/value-equal/umd/value-equal.js

@@ -0,0 +1,44 @@
+(function (global, factory) {
+  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
+  typeof define === 'function' && define.amd ? define(factory) :
+  (global.valueEqual = factory());
+}(this, (function () { 'use strict';
+
+  function valueOf(obj) {
+    return obj.valueOf ? obj.valueOf() : Object.prototype.valueOf.call(obj);
+  }
+
+  function valueEqual(a, b) {
+    // Test for strict equality first.
+    if (a === b) return true;
+
+    // Otherwise, if either of them == null they are not equal.
+    if (a == null || b == null) return false;
+
+    if (Array.isArray(a)) {
+      return (
+        Array.isArray(b) &&
+        a.length === b.length &&
+        a.every(function(item, index) {
+          return valueEqual(item, b[index]);
+        })
+      );
+    }
+
+    if (typeof a === 'object' || typeof b === 'object') {
+      var aValue = valueOf(a);
+      var bValue = valueOf(b);
+
+      if (aValue !== a || bValue !== b) return valueEqual(aValue, bValue);
+
+      return Object.keys(Object.assign({}, a, b)).every(function(key) {
+        return valueEqual(a[key], b[key]);
+      });
+    }
+
+    return false;
+  }
+
+  return valueEqual;
+
+})));