从日期获取日期名称，格式为dd-mm-yyyy? [英] Get day name from date with format dd-mm-yyyy?

问题描述

我需要一种获取日期名称的方法，例如从DD-MM-YYYY格式的日期开始我正在使用引导程序datetimepicker，并且当我选择一个日期时，该值仅采用DD-MM-YYYY格式，因此我无法使用 getDay()，因为格式与之不一致.

I need a way of getting the name of the day e.g Monday, Tuesday from a date with the format of DD-MM-YYYY I am using bootstrap datetimepicker and when i select a date, the value is just in the format DD-MM-YYYY, I can't use getDay() because the format doesn't agree with it.

我也不能使用 new Date()，因为我必须是从日历中选择的日期.不是今天.当我运行以下代码时，出现错误:

I also can't use new Date() because i has to be a date selected from a calendar. Not todays date. When I run the following code I get the error:

date.getDay()不是函数.

$('#datepicker').datetimepicker().on('dp.change', function (event) {
        let date = $(this).val();
        let day = date.getDay();
        console.log(day);
      });
```

Anyone any ideas?

推荐答案

按 Date 构造函数按原样解析字符串

Parsing string as-is by Date constructor is strongly discouraged, so I would rather recommend to convert your date string into Date the following way:

const dateStr = '15-09-2020',

      getWeekday = s => {
        const [dd, mm, yyyy] = s.split('-'),
              date = new Date(yyyy, mm-1, dd)
        return date.toLocaleDateString('en-US', {weekday: 'long'})
      }
      
console.log(getWeekday(dateStr))      

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