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frontend/node_modules/rc-util/lib/isEqual.js

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+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault").default;
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _typeof2 = _interopRequireDefault(require("@babel/runtime/helpers/typeof"));
+var _warning = _interopRequireDefault(require("./warning"));
+/**
+ * Deeply compares two object literals.
+ * @param obj1 object 1
+ * @param obj2 object 2
+ * @param shallow shallow compare
+ * @returns
+ */
+function isEqual(obj1, obj2) {
+  var shallow = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;
+  // https://github.com/mapbox/mapbox-gl-js/pull/5979/files#diff-fde7145050c47cc3a306856efd5f9c3016e86e859de9afbd02c879be5067e58f
+  var refSet = new Set();
+  function deepEqual(a, b) {
+    var level = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 1;
+    var circular = refSet.has(a);
+    (0, _warning.default)(!circular, 'Warning: There may be circular references');
+    if (circular) {
+      return false;
+    }
+    if (a === b) {
+      return true;
+    }
+    if (shallow && level > 1) {
+      return false;
+    }
+    refSet.add(a);
+    var newLevel = level + 1;
+    if (Array.isArray(a)) {
+      if (!Array.isArray(b) || a.length !== b.length) {
+        return false;
+      }
+      for (var i = 0; i < a.length; i++) {
+        if (!deepEqual(a[i], b[i], newLevel)) {
+          return false;
+        }
+      }
+      return true;
+    }
+    if (a && b && (0, _typeof2.default)(a) === 'object' && (0, _typeof2.default)(b) === 'object') {
+      var keys = Object.keys(a);
+      if (keys.length !== Object.keys(b).length) {
+        return false;
+      }
+      return keys.every(function (key) {
+        return deepEqual(a[key], b[key], newLevel);
+      });
+    }
+    // other
+    return false;
+  }
+  return deepEqual(obj1, obj2);
+}
+var _default = exports.default = isEqual;