Move internal modules to “internal” folder.

.internal/initCloneByTag.js

@@ -0,0 +1,80 @@
+import cloneArrayBuffer from './.internal/cloneArrayBuffer.js';
+import cloneDataView from './.internal/cloneDataView.js';
+import cloneMap from './.internal/cloneMap.js';
+import cloneRegExp from './.internal/cloneRegExp.js';
+import cloneSet from './.internal/cloneSet.js';
+import cloneSymbol from './.internal/cloneSymbol.js';
+import cloneTypedArray from './.internal/cloneTypedArray.js';
+
+/** `Object#toString` result references. */
+const boolTag = '[object Boolean]';
+const dateTag = '[object Date]';
+const mapTag = '[object Map]';
+const numberTag = '[object Number]';
+const regexpTag = '[object RegExp]';
+const setTag = '[object Set]';
+const stringTag = '[object String]';
+const symbolTag = '[object Symbol]';
+
+const arrayBufferTag = '[object ArrayBuffer]';
+const dataViewTag = '[object DataView]';
+const float32Tag = '[object Float32Array]';
+const float64Tag = '[object Float64Array]';
+const int8Tag = '[object Int8Array]';
+const int16Tag = '[object Int16Array]';
+const int32Tag = '[object Int32Array]';
+const uint8Tag = '[object Uint8Array]';
+const uint8ClampedTag = '[object Uint8ClampedArray]';
+const uint16Tag = '[object Uint16Array]';
+const uint32Tag = '[object Uint32Array]';
+
+/**
+ * Initializes an object clone based on its `toStringTag`.
+ *
+ * **Note:** This function only supports cloning values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to clone.
+ * @param {string} tag The `toStringTag` of the object to clone.
+ * @param {Function} cloneFunc The function to clone values.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Object} Returns the initialized clone.
+ */
+function initCloneByTag(object, tag, cloneFunc, isDeep) {
+  const Ctor = object.constructor;
+  switch (tag) {
+    case arrayBufferTag:
+      return cloneArrayBuffer(object);
+
+    case boolTag:
+    case dateTag:
+      return new Ctor(+object);
+
+    case dataViewTag:
+      return cloneDataView(object, isDeep);
+
+    case float32Tag: case float64Tag:
+    case int8Tag: case int16Tag: case int32Tag:
+    case uint8Tag: case uint8ClampedTag: case uint16Tag: case uint32Tag:
+      return cloneTypedArray(object, isDeep);
+
+    case mapTag:
+      return cloneMap(object, isDeep, cloneFunc);
+
+    case numberTag:
+    case stringTag:
+      return new Ctor(object);
+
+    case regexpTag:
+      return cloneRegExp(object);
+
+    case setTag:
+      return cloneSet(object, isDeep, cloneFunc);
+
+    case symbolTag:
+      return cloneSymbol(object);
+  }
+}
+
+export default initCloneByTag;