nodejs

npm

npm install packagename -g           //全局
npm install packagename --save       //運行環境依賴
npm install packagename --save-dev   //生產環境依賴

express

//跨域
app.use(function(req, res, next) {
    res.header("Access-Control-Allow-Origin", req.headers['origin']);
    res.header("Access-Control-Allow-Headers", "x-token,x-uid,x-token-check,x-requested-with,content-type,Host");
    res.header("Access-Control-Allow-Methods","PUT,POST,GET,DELETE,OPTIONS");
    res.header("Access-Control-Allow-Credentials","true");
    //res.header("X-Powered-By",' 3.2.1')
    //res.header("Content-Type", "application/json;charset=utf-8");
    next();
});

代碼片段

//格式化輸出時間
function dateFormat(date, fmt) {
    if (null == date || undefined == date) return '';
    let o = {
        "M+": date.getMonth() + 1, //月份
        "d+": date.getDate(),      //日
        "h+": date.getHours(),     //小時
        "m+": date.getMinutes(),   //分
        "s+": date.getSeconds(),   //秒
        "S":  date.getMilliseconds()//毫秒
    };
    if (/(y+)/.test(fmt)) fmt = fmt.replace(RegExp.$1, (date.getFullYear() + "").substr(4 - RegExp.$1.length));
    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.toJSON       = function () {return dateFormat(this, 'yyyy-MM-dd hh:mm:ss')};
Date.prototype.toString     = function () {return dateFormat(this, 'yyyy-MM-dd hh:mm:ss')};
Date.prototype.toDateString = function () {return dateFormat(this, 'yyyy-MM-dd')};
Date.prototype.toTimeString = function () {return dateFormat(this, 'hh:mm:ss')};