Нужно перебирать значения в таблице и если они не = 0 , то менять цвет ячейки [закрыт]

function colorCells() { 
  var tbl = document.getElementById("test"); 
  for (var i = 0; i < tbl.rows.length; i++) { 
    for (var j = 0; j < tbl.rows[i].cells.length; j++) { 
      var cell = tbl.rows[i].cells[j]; 
      if (cell.textContent != "0") { 
        cell.classList.add("green"); 
      } 
    } 
  } 
} 
/*function colorCells() { 
  var tbl = document.getElementById("test"); 
  [...tbl.rows].forEach( row => { 
    [...row.cells].forEach( cell => { 
      if (cell.textContent != "0") { 
        cell.classList.add("green"); 
      } 
    }) 
  }) 
}*/

td { 
  width:20px; 
  height:20px; 
  text-align:center; 
} 
 
.green { 
  background:lightgreen; 
}

<table id="test" border="1"> 
  <tr><td></td><td>0</td><td></td><td></td><td></td><td></td></tr> 
  <tr><td></td><td></td><td>0</td><td>0</td><td></td><td></td></tr> 
  <tr><td></td><td></td><td>0</td><td></td><td>0</td><td>0</td></tr> 
  <tr><td>0</td><td>0</td><td></td><td></td><td></td><td></td></tr> 
  <tr><td></td><td></td><td>0</td><td></td><td></td><td></td></tr> 
  <tr><td></td><td>0</td><td></td><td>0</td><td>0</td><td></td></tr> 
</table> 
<button onclick="colorCells()">Click</button>

let cells = document.querySelectorAll('td'); 
cells.forEach(cell => { 
  if (cell.innerText != '0') cell.style.backgroundColor = 'green' 
})

<table> 
  <tr> 
    <td>1</td> 
    <td>2</td> 
    <td>0</td> 
  </tr> 
  <tr> 
    <td>0</td> 
    <td>0</td> 
    <td>5</td> 
  </tr> 
  <tr> 
    <td>6</td> 
    <td>0</td> 
    <td>2</td> 
  </tr> 
</table>