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Copiar el color de fondo del elemento al portapapeles

Estoy tratando de copiar el color de fondo de un elemento al hacer clic. Obtengo el valor rgb calculado, pero lo que necesito copiar en el portapapeles es var(--primary)

https://codepen.io/avviodigital/pen/WNZNOVb

 const copyToClipboard = str => { const el = document.createElement('textarea'); el.value = str; document.body.appendChild(el); el.select(); document.execCommand('copy'); document.body.removeChild(el); }; jQuery('.card').click( function () { color = $(this).css( "background-color" ); copyToClipboard(color); });
 body { --primary: #7306f9; } .card { background-color: var(--primary); height: 50px; width: 50px; }
 <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script> <div class="card"></div>

about 4 years ago · Juan Pablo Isaza
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