Cells with Odd Values in a Matrix LeetCode solution in JavaScript

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var oddCells = function (m, n, indices) {
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  const matrix = Array.from(Array(m), () => Array(n).fill(0));
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  let res = 0;
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  for (const [r, c] of indices) {
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    for (let i = 0; i < n; i++) {
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      // toggle 0/1 for even/odd
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      // another method: matrix[r][i] = 1 - matrix[r][i]
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      // or: matrix[r][i] = +!matrix[r][i]
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      matrix[r][i] ^= 1;
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      if (matrix[r][i]) res++;
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      else res--;
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    }
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    for (let i = 0; i < m; i++) {
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      matrix[i][c] ^= 1;
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      if (matrix[i][c]) res++;
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      else res--;
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    }
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  }
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  return res;
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};