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37 lines
993 B
37 lines
993 B
var baseGetTag = require('./_baseGetTag'), |
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isObject = require('./isObject'); |
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/** `Object#toString` result references. */ |
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var asyncTag = '[object AsyncFunction]', |
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funcTag = '[object Function]', |
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genTag = '[object GeneratorFunction]', |
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proxyTag = '[object Proxy]'; |
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/** |
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* Checks if `value` is classified as a `Function` object. |
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* |
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* @static |
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* @memberOf _ |
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* @since 0.1.0 |
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* @category Lang |
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* @param {*} value The value to check. |
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* @returns {boolean} Returns `true` if `value` is a function, else `false`. |
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* @example |
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* |
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* _.isFunction(_); |
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* // => true |
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* |
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* _.isFunction(/abc/); |
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* // => false |
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*/ |
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function isFunction(value) { |
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if (!isObject(value)) { |
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return false; |
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} |
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// The use of `Object#toString` avoids issues with the `typeof` operator |
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// in Safari 9 which returns 'object' for typed arrays and other constructors. |
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var tag = baseGetTag(value); |
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return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag; |
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} |
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module.exports = isFunction;
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