Object

最新更新: 2019-08-22 17:14:34 阅读: 30次

IE浏览器不支持 Object.values  和 Object.keys,现另外实现 Object.values 、Object.keys支持IE(仅支持ie9及以上)

// Object.values  Object.keys兼容IE
if (!Object.values) Object.values = function(obj) {
    if (obj !== Object(obj))
        throw new TypeError('Object.values called on a non-object');
    var val=[],key;
    for (key in obj) {
        if (Object.prototype.hasOwnProperty.call(obj,key)) {
            val.push(obj[key]);
        }
    }
    return val;
}
if (!Object.keys) {
    Object.keys = (function () {
        var hasOwnProperty = Object.prototype.hasOwnProperty,
            hasDontEnumBug = !({toString: null}).propertyIsEnumerable('toString'),
            dontEnums = [
                'toString',
                'toLocaleString',
                'valueOf',
                'hasOwnProperty',
                'isPrototypeOf',
                'propertyIsEnumerable',
                'constructor'
            ],
            dontEnumsLength = dontEnums.length;

        return function (obj) {
            if (typeof obj !== 'object' && typeof obj !== 'function' || obj === null) throw new TypeError('Object.keys called on non-object');

            var result = [];

            for (var prop in obj) {
                if (hasOwnProperty.call(obj, prop)) result.push(prop);
            }

            if (hasDontEnumBug) {
                for (var i=0; i < dontEnumsLength; i++) {
                    if (hasOwnProperty.call(obj, dontEnums[i])) result.push(dontEnums[i]);
                }
            }
            return result;
        }
    })()
};