Method dfs

javascript/0212-word-search-ii.js:50–59

(board, row, rows, col, cols, node, words)

    }

    dfs(board, row, rows, col, cols, node, words) {
        const char = board[row][col];
        const child = node.children[char] || null;

        if (this.canSkip(char, child)) return;

        node = child;
        this.checkWord(node, words);
        this.backTrack(board, row, rows, col, cols, node, words);
    }

    canSkip(char, child) {
        const hasSeen = char === '#';