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var isObjectLike = require('../internal/isObjectLike'); /** `Object#toString` result references. */ var errorTag = '[object Error]'; /** 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 an `Error`, `EvalError`, `RangeError`, `ReferenceError`, * `SyntaxError`, `TypeError`, or `URIError` object. * * @static * @memberOf _ * @category Lang * @param {*} value The value to check. * @returns {boolean} Returns `true` if `value` is an error object, else `false`. * @example * * _.isError(new Error); * // => true * * _.isError(Error); * // => false */ function isError(value) { return isObjectLike(value) && typeof value.message == 'string' && objToString.call(value) == errorTag; } module.exports = isError;
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