diff --git a/.internal/Hash.js b/.internal/Hash.js
index f90554060..d51f371f4 100644
--- a/.internal/Hash.js
+++ b/.internal/Hash.js
@@ -1,17 +1,15 @@
-import hashClear from './.internal/hashClear.js';
-import hashDelete from './.internal/hashDelete.js';
-import hashGet from './.internal/hashGet.js';
-import hashHas from './.internal/hashHas.js';
-import hashSet from './.internal/hashSet.js';
+/** Used to stand-in for `undefined` hash values. */
+const HASH_UNDEFINED = '__lodash_hash_undefined__';
 
-/**
- * Creates a hash object.
- *
- * @private
- * @constructor
- * @param {Array} [entries] The key-value pairs to cache.
- */
 class Hash {
+
+  /**
+   * Creates a hash object.
+   *
+   * @private
+   * @constructor
+   * @param {Array} [entries] The key-value pairs to cache.
+   */
   constructor(entries) {
     let index = -1;
     const length = entries == null ? 0 : entries.length;
@@ -22,13 +20,70 @@ class Hash {
       this.set(entry[0], entry[1]);
     }
   }
+
+  /**
+   * Removes all key-value entries from the hash.
+   *
+   * @memberOf Hash
+   */
+  clear() {
+    this.__data__ = Object.create(null);
+    this.size = 0;
+  }
+
+  /**
+   * Removes `key` and its value from the hash.
+   *
+   * @memberOf Hash
+   * @param {Object} hash The hash to modify.
+   * @param {string} key The key of the value to remove.
+   * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+   */
+  delete(key) {
+    const result = this.has(key) && delete this.__data__[key];
+    this.size -= result ? 1 : 0;
+    return result;
+  }
+
+  /**
+   * Gets the hash value for `key`.
+   *
+   * @memberOf Hash
+   * @param {string} key The key of the value to get.
+   * @returns {*} Returns the entry value.
+   */
+  get(key) {
+    const data = this.__data__;
+    const result = data[key];
+    return result === HASH_UNDEFINED ? undefined : result;
+  }
+
+  /**
+   * Checks if a hash value for `key` exists.
+   *
+   * @memberOf Hash
+   * @param {string} key The key of the entry to check.
+   * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+   */
+  has(key) {
+    const data = this.__data__;
+    return data[key] !== undefined;
+  }
+
+  /**
+   * Sets the hash `key` to `value`.
+   *
+   * @memberOf Hash
+   * @param {string} key The key of the value to set.
+   * @param {*} value The value to set.
+   * @returns {Object} Returns the hash instance.
+   */
+  set(key, value) {
+    const data = this.__data__;
+    this.size += this.has(key) ? 0 : 1;
+    data[key] = value === undefined ? HASH_UNDEFINED : value;
+    return this;
+  }
 }
 
-// Add methods to `Hash`.
-Hash.prototype.clear = hashClear;
-Hash.prototype['delete'] = hashDelete;
-Hash.prototype.get = hashGet;
-Hash.prototype.has = hashHas;
-Hash.prototype.set = hashSet;
-
 export default Hash;
diff --git a/.internal/hashClear.js b/.internal/hashClear.js
deleted file mode 100644
index efb5962af..000000000
--- a/.internal/hashClear.js
+++ /dev/null
@@ -1,15 +0,0 @@
-import nativeCreate from './.internal/nativeCreate.js';
-
-/**
- * Removes all key-value entries from the hash.
- *
- * @private
- * @name clear
- * @memberOf Hash
- */
-function hashClear() {
-  this.__data__ = nativeCreate ? nativeCreate(null) : {};
-  this.size = 0;
-}
-
-export default hashClear;
diff --git a/.internal/hashDelete.js b/.internal/hashDelete.js
deleted file mode 100644
index 863dc6d69..000000000
--- a/.internal/hashDelete.js
+++ /dev/null
@@ -1,17 +0,0 @@
-/**
- * Removes `key` and its value from the hash.
- *
- * @private
- * @name delete
- * @memberOf Hash
- * @param {Object} hash The hash to modify.
- * @param {string} key The key of the value to remove.
- * @returns {boolean} Returns `true` if the entry was removed, else `false`.
- */
-function hashDelete(key) {
-  const result = this.has(key) && delete this.__data__[key];
-  this.size -= result ? 1 : 0;
-  return result;
-}
-
-export default hashDelete;
diff --git a/.internal/hashGet.js b/.internal/hashGet.js
deleted file mode 100644
index 4be6993e5..000000000
--- a/.internal/hashGet.js
+++ /dev/null
@@ -1,27 +0,0 @@
-import nativeCreate from './.internal/nativeCreate.js';
-
-/** Used to stand-in for `undefined` hash values. */
-const HASH_UNDEFINED = '__lodash_hash_undefined__';
-
-/** Used to check objects for own properties. */
-const hasOwnProperty = Object.prototype.hasOwnProperty;
-
-/**
- * Gets the hash value for `key`.
- *
- * @private
- * @name get
- * @memberOf Hash
- * @param {string} key The key of the value to get.
- * @returns {*} Returns the entry value.
- */
-function hashGet(key) {
-  const data = this.__data__;
-  if (nativeCreate) {
-    const result = data[key];
-    return result === HASH_UNDEFINED ? undefined : result;
-  }
-  return hasOwnProperty.call(data, key) ? data[key] : undefined;
-}
-
-export default hashGet;
diff --git a/.internal/hashHas.js b/.internal/hashHas.js
deleted file mode 100644
index 462df3ef6..000000000
--- a/.internal/hashHas.js
+++ /dev/null
@@ -1,20 +0,0 @@
-import nativeCreate from './.internal/nativeCreate.js';
-
-/** Used to check objects for own properties. */
-const hasOwnProperty = Object.prototype.hasOwnProperty;
-
-/**
- * Checks if a hash value for `key` exists.
- *
- * @private
- * @name has
- * @memberOf Hash
- * @param {string} key The key of the entry to check.
- * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
- */
-function hashHas(key) {
-  const data = this.__data__;
-  return nativeCreate ? (data[key] !== undefined) : hasOwnProperty.call(data, key);
-}
-
-export default hashHas;
diff --git a/.internal/hashSet.js b/.internal/hashSet.js
deleted file mode 100644
index 5062bc25c..000000000
--- a/.internal/hashSet.js
+++ /dev/null
@@ -1,23 +0,0 @@
-import nativeCreate from './.internal/nativeCreate.js';
-
-/** Used to stand-in for `undefined` hash values. */
-const HASH_UNDEFINED = '__lodash_hash_undefined__';
-
-/**
- * Sets the hash `key` to `value`.
- *
- * @private
- * @name set
- * @memberOf Hash
- * @param {string} key The key of the value to set.
- * @param {*} value The value to set.
- * @returns {Object} Returns the hash instance.
- */
-function hashSet(key, value) {
-  const data = this.__data__;
-  this.size += this.has(key) ? 0 : 1;
-  data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
-  return this;
-}
-
-export default hashSet;