Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

JavaScript Express Basics Parameters, Query Strings, and Modularizing Routes Randomize Cards

My solution using pugjs

So I'm sure I'm ignorant but his solution seems a bit over engineered. Anyway check out line 12 of cards.js thats the main difference. let me know what you think. Would this break easy if a client told me to change something?


const express = require('express');
const router = express.Router();
const { data } = require('../data/flashcardData.json');
const { cards } = data;

router.get('/:id', (req, res) => {
    const { side } = req.query;
    const { id } = req.params;
    const text = cards[id][side];
    const { hint } = cards[id];
    //sets showside to the opposite of side. 
    let showside = side === "question" ? "answer" : "question";

    const templateData = { text, hint, side, id , showside};
    res.render('card', templateData);

module.exports = router;


extends layout.pug

block content
    h2= text
    if side == "question"
        i Hint: #{hint}
    a(href=`http://localhost:3000/cards/${id}?side=${showside}`) #{side}

2 Answers

Ben McMahan
Ben McMahan
7,921 Points

Similar to what I came up with. One thing that I thought about was that we're relying on the URL being exact with no failsafe for anything other than "question" or "answer". That's where a flushed out else to handle that would be handy.

Otherwise, I prefer shorthand here.

router.get('/:id', (req, res) => {
    // Look for the query string to see which side to display
    const {side} = req.query;
    // Get the ID of the card
    const {id} = req.params;
    // Get the text of the selected card
    const text = cards[id][side];
    // Create text for the flip card link
    const sideToShow = side === 'question' ? 'answer' : 'question';
    const sideToShowDisplay = side === 'question' ? 'Show Answer' : 'Show Question';
    // Get the hint of the selected card
    const {hint} = cards[id];
    // Create an object to pass into the template
    const templateData = { id, text, sideToShow, sideToShowDisplay };

    if (side === 'question') {
        templateData.hint = hint;

    res.render('card', templateData) ;

I agree very fickle code solution looking back at this now. it gets the point of the lesson across though.