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  <title>Matrix division with guard</title>
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  <h1>Divide with zero check</h1>
  <p>Edit <code>b</code>; if any cell is <code>0</code>, Run shows the error line.</p>
  <pre id=out></pre>
  <script>!function(){function n(n,t,r){var o,e,u;for(n.push(t),o=0;o<2;o++){for(u="",e=0;e<2;e++)u+=r[o][e].toFixed(2)+"\t";n.push(u)}}var t=[[4,8],[2,6]],r=[[2,4],[1,3]],o=[];if(function(n){var t,r;for(t=0;t<2;t++)for(r=0;r<2;r++)if(0===n[t][r])return!0;return!1}(r))o.push("Cannot divide: matrix B contains a zero.");else{var e=function(n,t){var r,o,e=[];for(r=0;r<2;r++)for(e[r]=[],o=0;o<2;o++)e[r][o]=n[r][o]/t[r][o];return e}(t,r);n(o,"A",t),o.push(""),n(o,"B",r),o.push(""),n(o,"A / B (cell by cell)",e)}document.getElementById("out").textContent=o.join("\n")}()</script>
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JavaScript Matrix Division — Zero guard (Try It)