Assume ES5+ built-ins exist.

_DataView.js

@@ -1,6 +0,0 @@
-import getNative from './_getNative.js';
-import root from './_root.js';
-
-const DataView = getNative(root, 'DataView');
-
-export default DataView;

_Map.js

@@ -1,6 +0,0 @@
-import getNative from './_getNative.js';
-import root from './_root.js';
-
-const Map = getNative(root, 'Map');
-
-export default Map;

_Promise.js

@@ -1,6 +0,0 @@
-import getNative from './_getNative.js';
-import root from './_root.js';
-
-const Promise = getNative(root, 'Promise');
-
-export default Promise;

_Set.js

@@ -1,6 +0,0 @@
-import getNative from './_getNative.js';
-import root from './_root.js';
-
-const Set = getNative(root, 'Set');
-
-export default Set;

_Symbol.js

@@ -1,3 +0,0 @@
-import root from './_root.js';
-
-export default root.Symbol;

_Uint8Array.js

@@ -1,3 +0,0 @@
-import root from './_root.js';
-
-export default root.Uint8Array;

_WeakMap.js

@@ -1,6 +0,0 @@
-import getNative from './_getNative.js';
-import root from './_root.js';
-
-const WeakMap = getNative(root, 'WeakMap');
-
-export default WeakMap;

_baseAssignValue.js

@@ -1,5 +1,3 @@
-import defineProperty from './_defineProperty.js';
-
 /**
  * The base implementation of `assignValue` and `assignMergeValue` without
  * value checks.
@@ -10,8 +8,8 @@ import defineProperty from './_defineProperty.js';
  * @param {*} value The value to assign.
  */
 function baseAssignValue(object, key, value) {
-  if (key == '__proto__' && defineProperty) {
-    defineProperty(object, key, {
+  if (key == '__proto__') {
+    Object.defineProperty(object, key, {
       'configurable': true,
       'enumerable': true,
       'value': value,

_baseGetTag.js

@@ -1,4 +1,3 @@
-import Symbol from './_Symbol.js';
 import getRawTag from './_getRawTag.js';
 import objectToString from './_objectToString.js';
 

_baseSetToString.js

@@ -1,5 +1,4 @@
 import constant from './constant.js';
-import defineProperty from './_defineProperty.js';
 import identity from './identity.js';
 
 /**
@@ -10,11 +9,13 @@ import identity from './identity.js';
  * @param {Function} string The `toString` result.
  * @returns {Function} Returns `func`.
  */
-const baseSetToString = !defineProperty ? identity : (func, string) => defineProperty(func, 'toString', {
-  'configurable': true,
-  'enumerable': false,
-  'value': constant(string),
-  'writable': true
-});
+function baseSetToString(func, string){
+  return Object.defineProperty(func, 'toString', {
+    'configurable': true,
+    'enumerable': false,
+    'value': constant(string),
+    'writable': true
+  });
+}
 
 export default baseSetToString;

_baseToString.js

@@ -1,4 +1,3 @@
-import Symbol from './_Symbol.js';
 import arrayMap from './_arrayMap.js';
 import isSymbol from './isSymbol.js';
 

_cloneArrayBuffer.js

@@ -1,5 +1,3 @@
-import Uint8Array from './_Uint8Array.js';
-
 /**
  * Creates a clone of `arrayBuffer`.
  *

_cloneSymbol.js

@@ -1,8 +1,5 @@
-import Symbol from './_Symbol.js';
-
 /** Used to convert symbols to primitives and strings. */
-const symbolProto = Symbol ? Symbol.prototype : undefined;
-const symbolValueOf = symbolProto ? symbolProto.valueOf : undefined;
+const symbolValueOf = Symbol.prototype.valueOf;
 
 /**
  * Creates a clone of the `symbol` object.

_createSet.js

@@ -1,4 +1,3 @@
-import Set from './_Set.js';
 import setToArray from './_setToArray.js';
 
 /** Used as references for various `Number` constants. */

_defineProperty.js

@@ -1,11 +0,0 @@
-import getNative from './_getNative.js';
-
-const defineProperty = ((() => {
-  try {
-    const func = getNative(Object, 'defineProperty');
-    func({}, '', {});
-    return func;
-  } catch (e) {}
-})());
-
-export default defineProperty;

_equalByTag.js

@@ -1,5 +1,3 @@
-import Symbol from './_Symbol.js';
-import Uint8Array from './_Uint8Array.js';
 import eq from './eq.js';
 import equalArrays from './_equalArrays.js';
 import mapToArray from './_mapToArray.js';

_getNative.js

@@ -1,16 +0,0 @@
-import isNative from './isNative.js';
-
-/**
- * Gets the native function at `key` of `object`.
- *
- * @private
- * @param {Object} object The object to query.
- * @param {string} key The key of the method to get.
- * @returns {*} Returns the function if it's native, else `undefined`.
- */
-function getNative(object, key) {
-  const value = object == null ? undefined : object[key];
-  return isNative(value) ? value : undefined;
-}
-
-export default getNative;

_getRawTag.js

@@ -1,5 +1,3 @@
-import Symbol from './_Symbol.js';
-
 /** Used for built-in method references. */
 const objectProto = Object.prototype;
 

_getTag.js

@@ -1,8 +1,3 @@
-import DataView from './_DataView.js';
-import Map from './_Map.js';
-import Promise from './_Promise.js';
-import Set from './_Set.js';
-import WeakMap from './_WeakMap.js';
 import baseGetTag from './_baseGetTag.js';
 import toSource from './_toSource.js';
 
@@ -32,10 +27,10 @@ let getTag = baseGetTag;
 
 // Fallback for data views, maps, sets, and weak maps in IE 11 and promises in Node.js < 6.
 if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
-    (Map && getTag(new Map) != mapTag) ||
-    (Promise && getTag(Promise.resolve()) != promiseTag) ||
-    (Set && getTag(new Set) != setTag) ||
-    (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+    (getTag(new Map) != mapTag) ||
+    (getTag(Promise.resolve()) != promiseTag) ||
+    (getTag(new Set) != setTag) ||
+    (getTag(new WeakMap) != weakMapTag)) {
   getTag = value => {
     const result = baseGetTag(value);
     const Ctor = result == objectTag ? value.constructor : undefined;

_isFlattenable.js

@@ -1,9 +1,5 @@
-import Symbol from './_Symbol.js';
 import isArguments from './isArguments.js';
 
-/** Built-in value references. */
-const spreadableSymbol = Symbol ? Symbol.isConcatSpreadable : undefined;
-
 /**
  * Checks if `value` is a flattenable `arguments` object or array.
  *
@@ -13,7 +9,7 @@ const spreadableSymbol = Symbol ? Symbol.isConcatSpreadable : undefined;
  */
 function isFlattenable(value) {
   return Array.isArray(value) || isArguments(value) ||
-    !!(spreadableSymbol && value && value[spreadableSymbol]);
+    !!(Symbol.isConcatSpreadable && value && value[spreadableSymbol]);
 }
 
 export default isFlattenable;

_mapCacheClear.js

@@ -1,6 +1,5 @@
 import Hash from './_Hash.js';
 import ListCache from './_ListCache.js';
-import Map from './_Map.js';
 
 /**
  * Removes all key-value entries from the map.

_metaMap.js

@@ -1,6 +1 @@
-import WeakMap from './_WeakMap.js';
-
-/** Used to store function metadata. */
-const metaMap = WeakMap && new WeakMap;
-
-export default metaMap;
+export default new WeakMap;

_nativeCreate.js

@@ -1,6 +0,0 @@
-import getNative from './_getNative.js';
-
-/* Built-in method references that are verified to be native. */
-const nativeCreate = getNative(Object, 'create');
-
-export default nativeCreate;

_stackSet.js

@@ -1,5 +1,4 @@
 import ListCache from './_ListCache.js';
-import Map from './_Map.js';
 import MapCache from './_MapCache.js';
 
 /** Used as the size to enable large array optimizations. */

isNative.js

@@ -38,7 +38,7 @@ const reIsNative = RegExp(`^${
  * isNative(Array.prototype.push);
  * // => true
  *
- * isNative(_);
+ * isNative(isDate);
  * // => false
  */
 function isNative(value) {

toArray.js

@@ -1,4 +1,3 @@
-import Symbol from './_Symbol.js';
 import copyArray from './_copyArray.js';
 import getTag from './_getTag.js';
 import isArrayLike from './isArrayLike.js';