lodash.isnative - npm Package Compare versions

Comparing version 3.0.7 to 4.0.0

index.js

 /**
- * lodash 3.0.7 (Custom Build) <https://lodash.com/>
+ * lodash (Custom Build) <https://lodash.com/>
  * Build: `lodash modularize exports="npm" -o ./`
@@ -23,2 +23,11 @@ * Copyright jQuery Foundation and other contributors <https://jquery.org/>
 
+/** Detect free variable `global` from Node.js. */
+var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+/** Detect free variable `self`. */
+var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+/** Used as a reference to the global object. */
+var root = freeGlobal || freeSelf || Function('return this')();
+
 /**
@@ -46,2 +55,11 @@ * Checks if `value` is a host object in IE < 9.
 
+/** Used to detect overreaching core-js shims. */
+var coreJsData = root['__core-js_shared__'];
+
+/** Used to detect methods masquerading as native. */
+var maskSrcKey = (function() {
+  var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+  return uid ? ('Symbol(src)_1.' + uid) : '';
+}());
+
 /** Used to resolve the decompiled source of functions. */
@@ -67,2 +85,38 @@ var funcToString = Function.prototype.toString;
 /**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ *  else `false`.
+ */
+function baseIsNative(value) {
+  if (!isObject(value) || isMasked(value)) {
+    return false;
+  }
+  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+  return pattern.test(toSource(value));
+}
+
+/**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+function isMasked(func) {
+  return !!maskSrcKey && (maskSrcKey in func);
+}
+
+/**
+ * Checks if `func` is capable of being masked.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `func` is maskable, else `false`.
+ */
+var isMaskable = coreJsData ? isFunction : stubFalse;
+
+/**
  * Converts `func` to its source code.
@@ -94,4 +148,3 @@ *
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified,
- *  else `false`.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
  * @example
@@ -144,4 +197,12 @@ *
 /**
- * Checks if `value` is a native function.
+ * Checks if `value` is a pristine native function.
  *
+ * **Note:** This method can't reliably detect native functions in the presence
+ * of the core-js package because core-js circumvents this kind of detection.
+ * Despite multiple requests, the core-js maintainer has made it clear: any
+ * attempt to fix the detection will be obstructed. As a result, we're left
+ * with little choice but to throw an error. Unfortunately, this also affects
+ * packages, like [babel-polyfill](https://www.npmjs.com/package/babel-polyfill),
+ * which rely on core-js.
+ *
  * @static
@@ -163,9 +224,25 @@ * @memberOf _
 function isNative(value) {
-  if (!isObject(value)) {
-    return false;
+  if (isMaskable(value)) {
+    throw new Error('This method is not supported with core-js. Try https://github.com/es-shims.');
   }
-  var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
-  return pattern.test(toSource(value));
+  return baseIsNative(value);
 }
 
+/**
+ * This method returns `false`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.13.0
+ * @category Util
+ * @returns {boolean} Returns `false`.
+ * @example
+ *
+ * _.times(2, _.stubFalse);
+ * // => [false, false]
+ */
+function stubFalse() {
+  return false;
+}
+
 module.exports = isNative;

package.json

 {
   "name": "lodash.isnative",
-  "version": "3.0.7",
+  "version": "4.0.0",
   "description": "The lodash method `_.isNative` exported as a module.",
@@ -5,0 +5,0 @@ "homepage": "https://lodash.com/",

README.md

@@ -1,2 +0,2 @@
-# lodash.isnative v3.0.7
+# lodash.isnative v4.0.0
 
@@ -18,2 +18,2 @@ The [lodash](https://lodash.com/) method `_.isNative` exported as a [Node.js](https://nodejs.org/) module.
 
-See the [documentation](https://lodash.com/docs#isNative) or [package source](https://github.com/lodash/lodash/blob/3.0.7-npm-packages/lodash.isnative) for more details.
+See the [documentation](https://lodash.com/docs#isNative) or [package source](https://github.com/lodash/lodash/blob/4.0.0-npm-packages/lodash.isnative) for more details.

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Improved metrics

Total package byte prevSize

9892

increased by31.67%

Lines of code

219

increased by45.03%

No dependency changes