JSFiddle - React, Tailwind, and code Playground

HTML

<label class="checkbox-inline"><input type="checkbox" class="checkboxJobSeekerProfile entry_level" id="entry_level" value="entry_level">Entry-level</label>
<label class="checkbox-inline">
<input type="checkbox" class="checkboxJobSeekerProfile mid_level"
   id="mid_level" value="mid_level">Mid-level</label>
<label class="checkbox-inline"><input type="checkbox" class="checkboxJobSeekerProfile senior_level"
   id="senior_level" value="senior_level">Senior-level</label>
<label class="checkbox-inline"><input type="checkbox" class="checkboxJobSeekerProfile executive"
   id="executive" value="executive">Executive</label>
<button type="button" onclick="count()">Count</button>

JavaScript

function count() {
	alert($('input[type=checkbox].checkboxJobSeekerProfile:checked').length);
}