Method checkWord

javascript/0212-word-search-ii.js:68–73

(node, words)

    }

    checkWord(node, words) {
        if (!node.word.length) return;

        words.push(node.word);
        node.word = '';
    }

    backTrack(board, row, rows, col, cols, node, words) {
        const char = board[row][col];