使用纯JavaScript获取下周的开始和结束日期

Question

我正在使用moment.js计算下周的开始日期和结束日期。 但是现在由于某些缩小问题，我将其删除了。

我可以得到本周的开始和结束日期，如下所示：

var today = new Date; 
var first = today.getDate() - today.getDay(); 
(this.fromDate = new Date(today.setDate(first)));
(this.toDate  = new Date(today.setDate(last)));

如何找到下周的开始和结束日期？

Answer 1

您可以使用getFullYear() ， getMonth()和getDate()方法来实现。

 function getWeekBegin() { var now = new Date(); var next = new Date(now.getFullYear(), now.getMonth(), now.getDate()+(7 - now.getDay())); return next; } var firstDay = getWeekBegin(); console.log("First day: "+firstDay); var lastDay=firstDay.setDate(firstDay.getDate() + 6); console.log("Last day: "+new Date(lastDay)); 

Answer 2

不是您的工作成果的100％，但是如果您稍加修改，您应该能够弄清楚

function test() {
    var today = new Date; 
    alert(getMonday(today));
}
function getMonday( date ) {
    date.setHours((24*7));
    var day = date.getDay() || 7;  
    if( day !== 1 ) 
        date.setHours(-24 * (day - 1)); 
    return date;
}

刚刚编辑了答案，这应该可以让您在下一个星期一约会

Answer 3

距本周初只有7天，下周即可开始； 要获得一周的结束，请在周开始前增加6天。

 var date = new Date; var nextWeekStart = date.getDate() - date.getDay() + 7; var nextWeekFrom = new Date(date.setDate(nextWeekStart)); var nextWeekEnd = date.getDate() - date.getDay() + 6; var nextWeekTo = new Date(date.setDate(nextWeekEnd)); console.log('nextWeekFrom: ' + nextWeekFrom.toString()) console.log('nextWeekTo : ' + nextWeekTo.toString()) 

Answer 4

以下内容简化了代码并提供了一些解释。 setDate方法修改日期并返回新的时间值，因此可用于一次修改日期并创建副本。

 // Get current date var d = new Date(); // Set to next Sunday and copy var startOfWeek = new Date(d.setDate(d.getDate() + 7 - d.getDay())); // Set to the following Saturday d.setDate(d.getDate() + 6); console.log('Start of week: ' + startOfWeek.toString()); console.log('End of week : ' + d.toString()); // The following shows the dates formatted and in the host default language // Support for toLocaleString options may be lacking though var options = { weekday: 'long', year: 'numeric', month: 'long', day: 'numeric' }; console.log('Start of week: ' + startOfWeek.toLocaleString(undefined, options)); console.log('End of week : ' + d.toLocaleString(undefined, options));