js处理数据的方式记录

布满荆棘的人生 2022-09-23 08:41 150阅读 0赞

### 条件判断 ###

JavaScript把null、undefined、0、NaN和空字符串''视为false，其他值一概视为true。

### js中常用的数据处理记录 ###

//下拉框选中项的内容
    $("#subsidyType option:selected").text();
    //IE有时处理中文乱码
    var _borrowName = encodeURIComponent($.trim($("#userName").val()));
    window.open(encodeURI('http://api.xxx.cn/share/qqim?url=${weburl}/user/register.html?ui=${ui}&title=我在某某某网站帮你抢到注册壕礼&summary=快来领取和我一起赚钱吧！'));
    // input控件选择器
    $("input[name='username']")
    // 连续对一个对象的属性处理
    $(".offline_on_detail").attr("style","display:none").attr("data-status","off");

### 时间工具 ###

//时间处理文件-------------------------------------------------------------
    var now = new Date(); //当前日期   
    var nowDayOfWeek = now.getDay(); //今天本周的第几天   
    var nowDay = now.getDate(); //当前日   
    var nowMonth = now.getMonth(); //当前月   
    var nowYear = now.getYear(); //当前年   
    nowYear += (nowYear < 2000) ? 1900 : 0;
    //格局化日期：yyyy-MM-dd   
    function formatDate(date) {   
        var myyear = date.getFullYear();   
        var mymonth = date.getMonth()+1;   
        var myweekday = date.getDate();  
    
        if(mymonth < 10){   
            mymonth = "0" + mymonth;   
        }   
        if(myweekday < 10){   
            myweekday = "0" + myweekday;   
        }   
        return (myyear+"-"+mymonth + "-" + myweekday);   
    }  
    //获得本周的开端日期   
    function getWeekStartDate() {   
        var weekStartDate = new Date(nowYear, nowMonth, nowDay - nowDayOfWeek+1);   
        return formatDate(weekStartDate);   
    }  
    
    //获得本周的停止日期   
    function getWeekEndDate() {   
        var weekEndDate = new Date(nowYear, nowMonth, nowDay + (7 - nowDayOfWeek));   
        return formatDate(weekEndDate);   
    }