A variable is a piece of data in JavaScript that can be changed and compared to other variables. The var keyword is used to declare a variable in JavaScript. The important HTML elements used in this project are: Can you write an AI player that never loses? Can you create a computer opponent that always gives you opportunities to win? Can you improve that opponent so that it plays strongly but sometimes gives you an opportunity to win? Finally, we all know that it is possible to play a perfect game of Tic-Tac-Toe that results in a draw. The challenge we leave you with for your project is to write the algorithms so that the computer can be your opponent instead. At this point, you'll have a webpage that you can use to play Tic-Tac-Toe with a friend. You will also learn how to program Tic-Tac-Toe knowledge into your program to detect when the game has been won or ended in a draw. Then you will learn how to update the text values of HTML elements on the fly. Next you will learn how to make your webpage respond to mouse clicks on the Tic-Tac-Toe board using JavaScript. First you will learn how to write an HTML file (webpage) that represents a Tic-Tac-Toe board. Here are the steps covered in the Introduction.
The experience you gain from building the two-player game will help you when you take on the challenge of programming the computer to play against you. If you follow the steps in the Introduction, you can gradually build up a webpage that you can use to play Tic-Tac-Toe with a friend. The Introduction will help you get started, in a step-by-step manner. If you have not done any JavaScript programming before, we suggest you start with a simpler project, like Forms and Functions: Writing a Simple Calculator Program with JavaScript or ABC's of Programming: Writing a Simple 'Alphabetizer' with JavaScript. You should also be familiar with creating HTML form elements, and having them interact with JavaScript functions. To do this project, you should already be comfortable with creating basic HTML files using a text editor.
You will be writing a program that allows you to play a game of Tic-Tac-Toe against the computer. This is an example of an intermediate programming project.
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