1 files changed, 20 insertions, 0 deletions
diff --git a/src/util.js b/src/util.js
index 8b85ba7..74233f4 100644
--- a/src/util.js
+++ b/src/util.js
@@ -21,3 +21,23 @@ export function pairs(arr1, arr2) {
     .map((x, i) => arr2.map(y => [x, y]))
     .flat();
 }
+
+
+export function deepEqual(a, b, debug=false) {
+  if (typeof(a) === 'object') {
+    if (typeof(b) === 'object') {
+      // do deep equality
+      return [...new Set(Object.keys(a).concat(Object.keys(b)))].reduce(
+        (acc, key) => {
+          return acc && deepEqual(a[key], b[key]);
+        },
+        true 
+      );
+    } else {
+      // one object, one non-object
+      return false;
+    }
+  } else {
+    return a === b;
+  }
+}