Introduction to Debugging

Introduction

This repository contains the starter files for the 'Introduction to Debugging' exercise.

As part of this exercise you will debug a simple, browser-based 'card matching' game. The HTML, CSS, and JavaScript code that makes up the game has been provided. However, it's a bit... buggy.

Rules

The game is intended to work as follows:

The user is presented with a selection of 3 pairs of cards, for a total of 6 cards.
Each pair of cards features a matching symbol.
All of the cards are displayed 'face down', meaning that the symbols are not visible.
The user will select two cards, one at a time.
When a card is selected it will be flipped 'face up', meaning that the symbol will be displayed.
If the symbols match, the cards will remain face up.
If the symbols do not match, the cards will be flipped face down.
This continues until the user has matched all 6 cards.
When all 6 cards have been matched, a message is displayed and the game ends.

Bonus Features

Users are able to change the colour of the cards by adding any one of the following values to the end of the URL:
#green
#red
#orange

Defects

Our users have reported the following problems:

I am able to select more than 2 cards.
Cards do not seem to be compared/matched correctly.
The cards are never flipped face down, regardless of whether or not they match.
The game does not end, even after all the cards have been matched.

Additionally, adding the #green, #red, or #orange values to the URL and then refreshing the page does not update the colour of the cards.

Approach

Debug and fix each defect (in order if possible). Introduce each fix as a separate commit.
Focus on debugging the 'rules' (part 1) before moving on to the 'bonus features' (part 2).

Please review the accompanying class materials for additional details.

Attribution

Card background by Gordon Johnson, provided by Pixabay.