An efficient win check for connect four game !!

ConnectFour_Win_Logic.js

  checkWinner = ({ column, row, board }) => {
    // ROW CHECK
    for (var i = 0; i < 4; i++) {
      if (column - 3 + i >= 0 && column + i < 7) {
        if (this.checkLine(
          board[column - 3 + i][row],
          board[column - 2 + i][row],
          board[column - 1 + i][row],
          board[column - 0 + i][row],
        )) {
          return (board[column + i][row])
        }
      }
      // COLUMN CHECK
      if (row - 3 + i >= 0 && row + i < 6) {
        if (this.checkLine(
          board[column][row - 3 + i],
          board[column][row - 2 + i],
          board[column][row - 1 + i],
          board[column][row - 0 + i],
        )) {
          return (board[column][row + i])
        }
      }
      // DIAGONALS CHECK
      if (row - 3 + i >= 0 && row + i < 6 && column - 3 + i >= 0 && column + i < 7) {
        if (this.checkLine(
          board[column - 3 + i][row - 3 + i],
          board[column - 2 + i][row - 2 + i],
          board[column - 1 + i][row - 1 + i],
          board[column - 0 + i][row - 0 + i],
        )) {
          return (board[column + i][row + i])
        }
      }
      if (row + 3 - i < 6 && row - i >= 0 && column - 3 + i >= 0 && column + i < 7) {
        if (this.checkLine(
          board[column - 3 + i][row + 3 - i],
          board[column - 2 + i][row + 2 - i],
          board[column - 1 + i][row + 1 - i],
          board[column - 0 + i][row + 0 - i],
        )) {
          return (board[column + i][row - i])
        }
      }
    }
    return 0;
  }

  checkLine = (a, b, c, d) => {
    // Check first cell non-zero and all cells match
    return ((a != 0) && (a == b) && (a == c) && (a == d));
  }