new_contents: ;(function (w, doc) {
  
    // Enable strict mode
    "use strict";
  
    var picker = new Pikaday({
      field: document.getElementById('datepicker'),
      firstDay: 1,
      minDate: new Date(),
      maxDate: new Date(2020, 12, 31),
      yearRange: [2000,2020]
    });
  
  } )( this, this.document );
subject: Add pikaday js call.