Bump to v3.0.0.

support.js

@@ -0,0 +1,76 @@
+import isNative from './lang/isNative';
+import root from './internal/root';
+
+/** Used to detect functions containing a `this` reference. */
+var reThis = /\bthis\b/;
+
+/** Used for native method references. */
+var objectProto = Object.prototype;
+
+/** Used to detect DOM support. */
+var document = (document = root.window) && document.document;
+
+/** Native method references. */
+var propertyIsEnumerable = objectProto.propertyIsEnumerable;
+
+/**
+ * An object environment feature flags.
+ *
+ * @static
+ * @memberOf _
+ * @type Object
+ */
+var support = {};
+
+(function(x) {
+
+  /**
+   * Detect if functions can be decompiled by `Function#toString`
+   * (all but Firefox OS certified apps, older Opera mobile browsers, and
+   * the PlayStation 3; forced `false` for Windows 8 apps).
+   *
+   * @memberOf _.support
+   * @type boolean
+   */
+  support.funcDecomp = !isNative(root.WinRTError) && reThis.test(function() { return this; });
+
+  /**
+   * Detect if `Function#name` is supported (all but IE).
+   *
+   * @memberOf _.support
+   * @type boolean
+   */
+  support.funcNames = typeof Function.name == 'string';
+
+  /**
+   * Detect if the DOM is supported.
+   *
+   * @memberOf _.support
+   * @type boolean
+   */
+  try {
+    support.dom = document.createDocumentFragment().nodeType === 11;
+  } catch(e) {
+    support.dom = false;
+  }
+
+  /**
+   * Detect if `arguments` object indexes are non-enumerable.
+   *
+   * In Firefox < 4, IE < 9, PhantomJS, and Safari < 5.1 `arguments` object
+   * indexes are non-enumerable. Chrome < 25 and Node.js < 0.11.0 treat
+   * `arguments` object indexes as non-enumerable and fail `hasOwnProperty`
+   * checks for indexes that exceed their function's formal parameters with
+   * associated values of `0`.
+   *
+   * @memberOf _.support
+   * @type boolean
+   */
+  try {
+    support.nonEnumArgs = !propertyIsEnumerable.call(arguments, 1);
+  } catch(e) {
+    support.nonEnumArgs = true;
+  }
+}(0, 0));
+
+export default support;