1 files changed, 36 insertions, 0 deletions
diff --git a/value-equal/modules/index.js b/value-equal/modules/index.js
new file mode 100644
index 0000000..94d02c1
--- /dev/null
+++ b/value-equal/modules/index.js
@@ -0,0 +1,36 @@
+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;
+}
+
+export default valueEqual;