js prototype属性，类似.net扩展方法

时间：2023-12-27 14:20:55

prototype 属性使您有能力向对象添加属性和方法。

类似.net扩展方法

定义：

String.prototype.toWeekName = function () {

    var newDate = new Date(this.replace(/-/g, '/'));

    var weekday = new Array();

    weekday[] = "星期日";

    weekday[] = "星期一";

    weekday[] = "星期二";

    weekday[] = "星期三";

    weekday[] = "星期四";

    weekday[] = "星期五";

    weekday[] = "星期六";

    return weekday[newDate.getDay()];

}

调用

            var day = new Date();

            var month = (day.getMonth() + ) <  ? ("" + (day.getMonth() + )) : (day.getMonth() + );

            var date = day.getDate() <  ? ("" + day.getDate()) : day.getDate();

            var dayformat = day.getFullYear() + "-" + month + "-" + date;

            var week = dayformat.toWeekName();//调用

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