javascript - js-datepicker 日期范围结束基于开始

Question

我正在使用这个日期选择器 https://www.npmjs.com/package/js-datepicker并使其在大部分情况下都能正常工作。但是，我希望根据开始日期中选择的内容确定第二个日期的开始日期和结束日期。

HTML:

    <input type="text" name="message[dateStart][]" class='date date-start' placeholder="Start Date">

    <input type="text" name="message[dateEnd][]" class='date date-end' placeholder="End Date">  

当前的 JavaScript

// set date to 2 weeks from now calculated in milliseconds
var afterTwoWeeks = new Date(+new Date + 1209600000);

var pickerEnStart = datepicker('.date-start', {
  // dateSelected: new Date(2099, 0, 5)
  minDate: new Date(afterTwoWeeks),
  startDate: new Date(afterTwoWeeks),
  noWeekends: true,
  formatter: (input, date, instance) => {
    const value = date.toLocaleDateString()
    input.value = value // => '1/1/2099'
  }
})


var pickerEnEnd = datepicker('.date-end', {
  // dateSelected: new Date(2099, 0, 5)
  minDate: new Date(afterTwoWeeks),
  startDate: new Date(afterTwoWeeks),
  noWeekends: true,
  formatter: (input, date, instance) => {
    const value = date.toLocaleDateString()
    input.value = value // => '1/1/2099'
  }
})

我尝试了一些方法，但无法根据所选的开始日期来获取开始/结束的结束日期。

Answer 1

这似乎按照我期望的方式工作。

HTML

   <input type="text" name="message[dateStart][]" class='date date-start' placeholder="Start Date">

   <input type="text" name="message[dateEnd][]" class='date date-end' placeholder="End Date">  

   <input type="button" id="reset" name="reset" value="Reset">

JS

var afterTwoWeeks = new Date(+new Date + 1209600000)

// none of this works well if we can't clear dates
var reset = document.getElementById('reset')
reset.onclick = function() {
  pickerEnStart.setDate()
  pickerEnEnd.setDate()
}

var pickerEnStart = datepicker('.date-start', {
  minDate: new Date(afterTwoWeeks),
  startDate: new Date(afterTwoWeeks),
  noWeekends: true,
  formatter: (input, date, instance) => {
    const value = date.toLocaleDateString()
    input.value = value 
  },
  id: 1,
  onSelect: (instance, date) => {
    // set the minimum date
    instance.setMin(date)
    // if end date not selected...
    if(!pickerEnEnd.dateSelected) { 
      // set the end date to force the calendar to display that month
      pickerEnEnd.setDate(new Date(date.getTime() + 1000*60*60*24), true)
      pickerEnEnd.firstTime = true
    }
  }
})

var pickerEnEnd = datepicker('.date-end', {
  minDate: new Date(afterTwoWeeks),
  startDate: new Date(afterTwoWeeks),
  noWeekends: true,
  formatter: (input, date, instance) => {
    const value = date.toLocaleDateString()
    input.value = value
  }, 
  id: 1,
  onSelect: (instance, date) => {
    instance.setMax(date)
  },
  onShow: function(instance) {
    // if this is the first time we're seeing this calendar...
    if (instance.firstTime) {
      // get rid of the end date we set to force it to this month
      instance.setDate();
      instance.firstTime = false;
    }
  },
})