JSFiddle - React, Tailwind, and code Playground

HTML

<span class='displaybutton minus' style='cursor:pointer;'></span>

CSS

.displaybutton.minus:before {
  content: '\2296';
}

.displaybutton.plus:before {
  content: '\2295';
}

JavaScript

$('.displaybutton').click(function(){
    $('#otherResponseList').toggle(); 
    $(this).toggleClass('plus');
});