ut2/lib/isArguments.js

一个现代 JavaScript 实用工具库。[点击查看在线文档]。

'use strict';

var native = require('./internals/native.js');
var helpers = require('./internals/helpers.js');
var isObjectLike = require('./isObjectLike.js');
var getTag = require('./internals/getTag.js');

function isArguments(value) {
    if (helpers.supportedArgumentsType) {
        return getTag(value) === native.argumentsTag;
    }
    return isObjectLike(value) && native.objectProtoHasOwnProperty.call(value, 'callee') && !native.objectProtoPropertyIsEnumerable.call(value, 'callee');
}

module.exports = isArguments;