JSFiddle - React, Tailwind, and code Playground

HTML

<div   id= "wraper "> 
        <div   class= "main "> 
        <ul> 
                <li> <div id="square" class="box"> parallelogram </div> </li> 
                <li> <div   id   = "parallelogram" class="box"> parallelogram </div> </li> 
                <li> <div   id   = "parallelogram2" class="box"> parallelogram2 </div> </li> 
        </ul> 
        </div> 
<textarea   name= "show"   id= "show"   cols="30"   rows= "10"> 

</textarea>

CSS

#square   {     
  width:   100px;                                                 
  height:   100px;                                               
  background:   red;                                         
}   

#parallelogram{ 
      width:100px; 
      height:70px; 
      background:blue; 
      -webkit-transform:skew(20deg); 
      -moz-transform:skew(20deg); 
      -o-transform:skew(20deg); 
      transform:skew(20deg); 
} 

#parallelogram2{ 
      width:100px; 
      height:70px; 
      background:blue; 
      -webkit-transform:skew(-20deg); 
      -moz-transform:skew(-20deg); 
      -o-transform:skew(-20deg); 
      transform:skew(-20deg); 
}

JavaScript

$(".box").click(function(){
     
      var style = $.param(css($(this))).replace(/&/g,';\n');
      $("#show").val(style); 

  });

function css(a){
    var sheets = document.styleSheets, o = {};
    for(var i in sheets) {
        var rules = sheets[i].rules || sheets[i].cssRules;
        for(var r in rules) {
            if(a.is(rules[r].selectorText)) {
                o = $.extend(o, css2json(rules[r].style), css2json(a.attr('style')));
            }
        }
    }
    return o;
}

function css2json(css){
        var s = {};
        if(!css) return s;
        if(css instanceof CSSStyleDeclaration) {
            for(var i in css) {
                if((css[i]).toLowerCase) {
                    s[(css[i]).toLowerCase()] = (css[css[i]]);
                }
            }
        } else if(typeof css == "string") {
            css = css.split("; ");          
            for (var i in css) {
                var l = css[i].split(": ");
                s[l[0].toLowerCase()] = (l[1]);
            };
        }
        return s;
    }