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'use strict'; var hasToStringTag = require('has-tostringtag/shams')(); var callBound = require('call-bind/callBound'); var $toString = callBound('Object.prototype.toString'); var isStandardArguments = function isArguments(value) { if (hasToStringTag && value && typeof value === 'object' && Symbol.toStringTag in value) { return false; } return $toString(value) === '[object Arguments]'; }; var isLegacyArguments = function isArguments(value) { if (isStandardArguments(value)) { return true; } return value !== null && typeof value === 'object' && typeof value.length === 'number' && value.length >= 0 && $toString(value) !== '[object Array]' && $toString(value.callee) === '[object Function]'; }; var supportsStandardArguments = (function () { return isStandardArguments(arguments); }()); isStandardArguments.isLegacyArguments = isLegacyArguments; // for tests module.exports = supportsStandardArguments ? isStandardArguments : isLegacyArguments;