javascript - 如何确定特定时间是否在javascript中的给定时间范围之间

Question

我想在两个时间 var open_time 和 var close_time 之间检查 var check_val

var open_time  = "23:30";
var close_time = "06:30";
var check_val  ="02:30";
if(Date.parse ( check_val ) > Date.parse ( open_time ) && Date.parse ( check_val ) < Date.parse ( close_time )){
    var flag=1;
} else { 
    var flag=2
}

结果总是其他部分

Answer 1

您可以创建自己的对象来保存时间，然后编写一个使用它的函数：

var Time = function(timeString) {
    var t = timeString.split(":");
    this.hour = parseInt(t[0]);
    this.minutes = parseInt(t[1]);
    this.isBiggerThan = function(other) { 
        return (this.hour > other.hour) || (this.hour === other.hour) && (this.minutes > other.minutes);
    };
}

var timeIsBetween = function(start, end, check) {
    return (start.hour <= end.hour) ? check.isBiggerThan(start) && !check.isBiggerThan(end)
    : (check.isBiggerThan(start) && check.isBiggerThan(end)) || (!check.isBiggerThan(start) && !check.isBiggerThan(end));    
}

var openTime = new Time("23:30");
var closeTime = new Time("06:30");
var checkTime = new Time("02:30");

var isBetween  = timeIsBetween(openTime, closeTime, checkTime);

Answer 2

Date.parse()接受RFC2822或ISO8601格式的日期。

在您的情况下，它总是返回NaN.

Date.parse("23:30"); // NaN

使用适当的日期格式按预期工作：

var open_time = Date.parse("2011-10-09T23:30");
var close_time = Date.parse("2011-10-10T06:30");
var check_val = Date.parse("2011-10-10T02:30");

if( check_val > open_time && check_val < close_time ) {
    var flag=1;
} else { 
    var flag=2
}