grid.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    
</body>

<script>
function printGrid(grid) {
        for(var i = 0; i < grid.length; i++) {
            console.log(grid[i].join(' '));
        }
    }

    function create2DGrid(size) {
        let i = size;
        const grid = [];
        while (i--) {
          grid.push(new Array(size)); 
        }
        return grid;
    }

function createSpiral(n) {
    const spiral = create2DGrid(n);
    let currentNumber = 1;
    let i =0;
    let j = 0;
    let di = 0;
    let dj = 1;
    while(currentNumber <= n * n) {
      spiral[i][j] = currentNumber++;
      
      if( j + dj === n || i + di === n || j + dj === -1 || spiral[i + di][j + dj]) {
          // when number riches far right corner it equals parametar number (n)
        const tmpDi = di;
        di = dj;
        dj = -tmpDi;
      }
      i += di;
      j += dj;
    }
  
    return spiral;
    
    
}

printGrid(createSpiral(10));


</script>
</html>