Laravel, how to get the variable from js?

Question

Views

Deadline: <span class = "deadline">this will replace a new date</span>

JS

$.each(items, function (index, value) {
        talent = new TalentListMasonry({
          deadline: value.timeline,
          url: value.talent_url,
          isUrgent: value.is_urgent == 1
        });
        var final = talent.make();
        lll.append(final).isotope('insert', final);
      });

My question is, how do i check the date is equal to 2017-12-30?

my idea is like this,

@if(deadline == 2017-12-30)
  <h1>Success</h1>
@endif