The code

Now that you are familiar with the HTML5 APIs used in this fun game, let's look under the covers and see how the game was put together. Due to brevity and ease of explanation, only the main portions of the source code for this game will be listed or explained here. Be sure to download the complete source code for the game at the book's website.

The HTML structure

The first component of this game was the HTML structure. The main pieces of it are the tracks where each player moves, along with each individual player, and the containers that show the text that needs to be typed by the user. There is also a second container that displays whatever text the player actually types in. For customization, there is an input type range that allows the player to change the difficulty level of the game, which for all practical purposes, only increases the speed attribute of the enemy player.

<section class="tracks">
  <div class="track">
    <span data-name="badGuy" data-speed="0"...