more work

node_modules/lodash/lang/isBoolean.js

@@ -0,0 +1,35 @@
+var isObjectLike = require('../internal/isObjectLike');
+
+/** `Object#toString` result references. */
+var boolTag = '[object Boolean]';
+
+/** Used for native method references. */
+var objectProto = Object.prototype;
+
+/**
+ * Used to resolve the [`toStringTag`](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-object.prototype.tostring)
+ * of values.
+ */
+var objToString = objectProto.toString;
+
+/**
+ * Checks if `value` is classified as a boolean primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+ * @example
+ *
+ * _.isBoolean(false);
+ * // => true
+ *
+ * _.isBoolean(null);
+ * // => false
+ */
+function isBoolean(value) {
+  return value === true || value === false || (isObjectLike(value) && objToString.call(value) == boolTag);
+}
+
+module.exports = isBoolean;