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  <title>Binary — digit peel</title>
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  <h1>Digit peel</h1>
  <p>Edit <code>binaryForm</code> (only 0 and 1 digits), then <strong>Run</strong>.</p>
  <pre id=out></pre>
  <script>!function(){var r=function(r){if(!function(r){if("number"!=typeof r||!isFinite(r)||!Number.isInteger(r)||r<0)return!1;if(0===r)return!0;for(var t=r;t>0;){if(t%10>1)return!1;t=Math.floor(t/10)}return!0}(r))return-1;for(var t=0,n=1,e=r;e>0;){t+=e%10*n,e=Math.floor(e/10),n*=2}return t}(101010),t=r<0?"Invalid binary digit pattern.":"Binary (digit form): 101010\nDecimal: "+r;document.getElementById("out").textContent=t}()</script>
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JavaScript Binary to Decimal — digit peel (Try It)