date.ts

declare global {
    interface Date {
        format(fmt: string): string;
        isToday(): boolean;
    }
}
let week = ["一", "二", "三", "四", "五", "六", "日"];
let week_pre = ["", "周", "星期"];
Date.prototype.format = function (fmt: string): string {
    var o = {
        "M+": this.getMonth() + 1, //月份 
        "D+": this.getDate(), //日 
        "H+": this.getHours(), //24小时
        "h+": this.getHours() % 12 == 0 ? 12 : this.getHours() % 12, //小时       
        "m+": this.getMinutes(), //分 
        "s+": this.getSeconds(), //秒 
        "q+": Math.floor((this.getMonth() + 3) / 3), //季度 
        "S": this.getMilliseconds() //毫秒 
    };
    if (/([y|Y]{2,4})/.test(fmt)) fmt = fmt.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));
    if (/(d{1,3})/.test(fmt)) {
        fmt = fmt.replace(RegExp.$1, (week_pre[RegExp.$1.length]) + week[this.getDay()]);
    }
    for (var k in o)
        if (new RegExp("(" + k + ")").test(fmt)) fmt = fmt.replace(RegExp.$1, (RegExp.$1.length == 1) ? (o[k]) : (("00" + o[k]).substr(("" + o[k]).length)));
    return fmt;
}

Date.prototype.isToday = (): boolean => {
    let today = new Date();
    return today.getFullYear() === this.getFullYear() && today.getMonth() === this.getMonth() && today.getDate() === this.getDate();
};
export { };