react app

react-app/node_modules/lodash/lang/isNumber.js

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+var isObjectLike = require('../internal/isObjectLike');
+
+/** `Object#toString` result references. */
+var numberTag = '[object Number]';
+
+/** Used for native method references. */
+var objectProto = Object.prototype;
+
+/**
+ * Used to resolve the [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objToString = objectProto.toString;
+
+/**
+ * Checks if `value` is classified as a `Number` primitive or object.
+ *
+ * **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are classified
+ * as numbers, use the `_.isFinite` method.
+ *
+ * @static
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+ * @example
+ *
+ * _.isNumber(8.4);
+ * // => true
+ *
+ * _.isNumber(NaN);
+ * // => true
+ *
+ * _.isNumber('8.4');
+ * // => false
+ */
+function isNumber(value) {
+  return typeof value == 'number' || (isObjectLike(value) && objToString.call(value) == numberTag);
+}
+
+module.exports = isNumber;