[Pickadate] Extend Pickadate for `from` & `to` dates functionality

pickadate-from-to.md

Extend pickadate v3 to get from and to date functionality

HTML:

#### From:

<fieldset>
  <input type="text" id="input_from">
</fieldset>

#### To:

<fieldset>
  <input type="text" id="input_to">
</fieldset>

CSS:

/**
 * Housekeeping
 */
body {
  font-family: sans-serif;
  font-weight: 200;
  font-size: 18px;
  line-height: 1.5;
  max-width: 540px;
  margin: 0 auto;
  padding: 2em 0;
}
fieldset {
  margin: 1em 0;
  border: 0;
  padding: 0;
  position: relative;
}
input {
  font-size: 1em;
  font-family: sans-serif;
  font-weight: 200;
  border: 2px solid #999;
  padding: .75em 1em;
  display: block;
  width: 100%;
  box-sizing: border-box;
  margin: 0;
}
input:focus {
  border-color: #0089ec;
}
a {
  color: #0089ec;
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

.whitespace:before {
  content: "...some content here...";
  color: #ccc;
  background: #f5f5f5;
  margin: 1em 0;
  padding: 5em 0;
  font-weight: bold;
  font-size: 1.5em;
  letter-spacing: 2px;
  text-align: center;
  display: block;
  text-transform: uppercase;
}





.picker{font-size:16px;text-align:left;line-height:1.2;color:#000;position:absolute;z-index:10000}.picker__input.picker__input--active{border-color:#0089ec}.picker__holder{width:100%;overflow-y:auto;-webkit-overflow-scrolling:touch}.picker{width:100%}.picker__holder{position:absolute;background:#fff;border:1px solid #aaa;border-top:0;-webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box;min-width:176px;max-width:466px;-webkit-border-radius:0 0 6px 6px;-moz-border-radius:0 0 6px 6px;border-radius:0 0 6px 6px;max-height:0;-ms-filter:"alpha(Opacity=0)";filter:alpha(opacity=0);-moz-opacity:0;opacity:0;-webkit-transform:translateY(-1em) perspective(600px) rotateX(10deg);-moz-transform:translateY(-1em) perspective(600px) rotateX(10deg);transform:translateY(-1em) perspective(600px) rotateX(10deg);-webkit-transition:all .15s ease-out,max-height 0 .15s;-moz-transition:all .15s ease-out,max-height 0 .15s;transition:all .15s ease-out,max-height 0 .15s}.picker--opened .picker__holder{max-height:25em;-ms-filter:"alpha(Opacity=100)";filter:alpha(opacity=100);-moz-opacity:1;opacity:1;-webkit-transform:translateY(0) perspective(600px) rotateX(0);-moz-transform:translateY(0) perspective(600px) rotateX(0);transform:translateY(0) perspective(600px) rotateX(0);-webkit-transition:all .15s ease-out,max-height 0;-moz-transition:all .15s ease-out,max-height 0;transition:all .15s ease-out,max-height 0;-webkit-box-shadow:0 6px 18px 1px rgba(0,0,0,.12);-moz-box-shadow:0 6px 18px 1px rgba(0,0,0,.12);box-shadow:0 6px 18px 1px rgba(0,0,0,.12)}



.picker__box{padding:0 1em}.picker__header{text-align:center;position:relative;margin-top:.75em}.picker__month,.picker__year{font-weight:500;display:inline-block;margin-left:.25em;margin-right:.25em}.picker__year{color:#999;font-size:.8em;font-style:italic}.picker__select--month,.picker__select--year{font-size:.8em;border:1px solid #b7b7b7;height:2.5em;padding:.66em .25em;margin-left:.25em;margin-right:.25em;margin-top:-.5em}.picker__select--month{width:35%}.picker__select--year{width:22.5%}.picker__select--month:focus,.picker__select--year:focus{border-color:#0089ec}.picker__nav--prev,.picker__nav--next{position:absolute;top:-.33em;padding:.5em 1.33em;width:1em;height:1em}.picker__nav--prev{left:-1em;padding-right:1.5em}.picker__nav--next{right:-1em;padding-left:1.5em}.picker__nav--prev:before,.picker__nav--next:before{content:" ";border-top:.5em solid transparent;border-bottom:.5em solid transparent;border-right:.75em solid #000;width:0;height:0;display:block;margin:0 auto}.picker__nav--next:before{border-right:0;border-left:.75em solid #000}.picker__nav--prev:hover,.picker__nav--next:hover{cursor:pointer;color:#000;background:#b1dcfb}.picker__nav--disabled,.picker__nav--disabled:hover,.picker__nav--disabled:before,.picker__nav--disabled:before:hover{cursor:default;background:0;border-right-color:whitesmoke;border-left-color:whitesmoke}.picker__table{text-align:center;border-collapse:collapse;border-spacing:0;table-layout:fixed;font-size:inherit;width:100%;margin-top:.75em;margin-bottom:.5em}@media (min-height:26.5em){.picker__table{margin-bottom:.75em}}.picker__table td{margin:0;padding:0}.picker__weekday{width:14.285714286%;font-size:.75em;padding-bottom:.25em;color:#999;font-weight:500}@media (min-height:26.5em){.picker__weekday{padding-bottom:.5em}}.picker__day{padding:.3125em 0;font-weight:200;border:1px solid transparent}.picker__day--today{color:#0089ec;position:relative}.picker__day--today:before{content:" ";position:absolute;top:2px;right:2px;width:0;height:0;border-top:.5em solid #0059bc;border-left:.5em solid transparent}.picker__day--selected,.picker__day--selected:hover{border-color:#0089ec}.picker__day--highlighted{background:#b1dcfb}.picker__day--disabled:before{border-top-color:#aaa}.picker__day--outfocus{color:#ddd;-ms-filter:"alpha(Opacity=66)";filter:alpha(opacity=66);-moz-opacity:.66;opacity:.66}.picker__day--infocus:hover,.picker__day--outfocus:hover{cursor:pointer;color:#000;background:#b1dcfb}.picker__day--highlighted:hover,.picker--focused .picker__day--highlighted{background:#0089ec;color:#fff}.picker__day--disabled,.picker__day--disabled:hover{background:whitesmoke;border-color:whitesmoke;color:#ddd;cursor:default}.picker__footer{text-align:center}.picker__button--today,.picker__button--clear{border:1px solid #fff;background:#fff;font-size:.8em;padding:.66em 0;font-weight:700;width:50%;display:inline-block;vertical-align:bottom}.picker__button--today:hover,.picker__button--clear:hover{cursor:pointer;color:#000;background:#b1dcfb;border-bottom-color:#b1dcfb}.picker__button--today:focus,.picker__button--clear:focus{background:#b1dcfb;border-color:#0089ec;outline:0}.picker__button--today:before,.picker__button--clear:before{position:relative;display:inline-block;height:0}.picker__button--today:before{content:" ";margin-right:.45em;top:-.05em;width:0;border-top:.66em solid #0059bc;border-left:.66em solid transparent}.picker__button--clear:before{content:"\D7";margin-right:.35em;top:-.1em;color:#e20;vertical-align:top;font-size:1.1em}

JS:

var from_$input = $('#input_from').pickadate(),
    from_picker = from_$input.pickadate('picker')

var to_$input = $('#input_to').pickadate(),
    to_picker = to_$input.pickadate('picker')


// Check if there’s a “from” or “to” date to start with.
if ( from_picker.get('value') ) {
  to_picker.set('min', from_picker.get('select'))
}
if ( to_picker.get('value') ) {
  from_picker.set('max', to_picker.get('select'))
}

// When something is selected, update the “from” and “to” limits.
from_picker.on('set', function(event) {
  if ( event.select ) {
    to_picker.set('min', from_picker.get('select'))    
  }
  else if ( 'clear' in event ) {
    to_picker.set('min', false)
  }
})
to_picker.on('set', function(event) {
  if ( event.select ) {
    from_picker.set('max', to_picker.get('select'))
  }
  else if ( 'clear' in event ) {
    from_picker.set('max', false)
  }
})

Reference: https://codepen.io/amsul/pen/nGckA