planning

node_modules/@mapbox/mapbox-gl-style-spec/util/deep_equal.js

@@ -0,0 +1,28 @@
+// @flow
+
+/**
+ * Deeply compares two object literals.
+ *
+ * @private
+ */
+function deepEqual(a: ?mixed, b: ?mixed): boolean {
+    if (Array.isArray(a)) {
+        if (!Array.isArray(b) || a.length !== b.length) return false;
+        for (let i = 0; i < a.length; i++) {
+            if (!deepEqual(a[i], b[i])) return false;
+        }
+        return true;
+    }
+    if (typeof a === 'object' && a !== null && b !== null) {
+        if (!(typeof b === 'object')) return false;
+        const keys = Object.keys(a);
+        if (keys.length !== Object.keys(b).length) return false;
+        for (const key in a) {
+            if (!deepEqual(a[key], b[key])) return false;
+        }
+        return true;
+    }
+    return a === b;
+}
+
+export default deepEqual;