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x/lodash/isFunction.js

A modern JavaScript utility library delivering modularity, performance, & extras.
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import isObject from './isObject.js';
/** `Object#toString` result references. */var funcTag = '[object Function]', genTag = '[object GeneratorFunction]';
/** Used for built-in method references. */var objectProto = Object.prototype;
/** * Used to resolve the * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring) * of values. */var objectToString = objectProto.toString;
/** * Checks if `value` is classified as a `Function` object. * * @static * @memberOf _ * @since 0.1.0 * @category Lang * @param {*} value The value to check. * @returns {boolean} Returns `true` if `value` is a function, else `false`. * @example * * _.isFunction(_); * // => true * * _.isFunction(/abc/); * // => false */function isFunction(value) { // The use of `Object#toString` avoids issues with the `typeof` operator // in Safari 8-9 which returns 'object' for typed array and other constructors. var tag = isObject(value) ? objectToString.call(value) : ''; return tag == funcTag || tag == genTag;}
export default isFunction;