JSFiddle - React, Tailwind, and code Playground

by dirtyd77

HTML

<link rel="stylesheet" href="http://code.jquery.com/ui/1.9.2/themes/base/jquery-ui.css">
<button id="btn_select">End Selection</button>

<ol id="selectable">
  <li class="ui-state-default">1</li>
  <li class="ui-state-default">2</li>
  <li class="ui-state-default">3</li>
  <li class="ui-state-default">4</li>
  <li class="ui-state-default">5</li>
  <li class="ui-state-default">6</li>
  <li class="ui-state-default">7</li>
  <li class="ui-state-default">8</li>
  <li class="ui-state-default">9</li>
  <li class="ui-state-default">10</li>
  <li class="ui-state-default">11</li>
  <li class="ui-state-default">12</li>
</ol>

CSS

#feedback { font-size: 1.4em; }
#selectable .ui-selecting { background: #FECA40; }
  #selectable .ui-selected { background: #F39814; color: white; }
  #selectable { list-style-type: none; margin: 0; padding: 0; width: 450px; }
  #selectable li { margin: 3px; padding: 1px; float: left; width: 100px; height: 80px; font-size: 4em; text-align: center; }
#btn_select{display:none;}

JavaScript

$(function() {
    var _clicked = false;
        
    $('#btn_select').click(function(){
        _clicked = false;
        $(this).hide();
        $('#selectable li').removeAttr('unselectable style');
        $('.ui-selecting').addClass('ui-selected').removeClass('ui-selecting');
    });
    
    $('#selectable li').click(function(){
        if(!_clicked){
            _clicked = true;
            $('.ui-selected').removeClass('ui-selected');
            $('#selectable li').attr('unselectable', 'on').css('user-select', 'none');
            $('#btn_select').show();
        }
        
        if($(this).hasClass('ui-selecting')){
            $(this).removeClass('ui-selecting');
        }else{
            $(this).addClass('ui-selecting');
        }
    });
});