HTML5 + JavaScript Tutorial: WeChat Flying Game Source Code
In this tutorial, we'll learn how to create a simple flying game using HTML5 and JavaScript. This game is designed to be played on WeChat, a popular social media platform in China. By the end of this tutorial, you'll have a good understanding of how to use HTML5 and JavaScript to create interactive games.
Prerequisites
Before we get started, make sure you have the following:
- A text editor (such as Sublime Text)
- A modern web browser (such as Chrome or Firefox)
Step 1: Setting Up the HTML File
First, let's create a basic HTML file. Open your text editor and create a new file called index.html
. Copy and paste the following code into your file:
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This code sets up the basic structure of our web page. We've included a canvas element, which we'll use to draw our game graphics. We've also linked to a JavaScript file called app.js
, which we'll create in the next step.
Step 2: Creating the JavaScript File
Next, let's create a JavaScript file called app.js
. This file will contain all of the game logic. Copy and paste the following code into your file:
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This code sets up a few variables and functions that we'll use to create our game. We've created a canvas
object and a ctx
object, which we'll use to draw our graphics. We've also loaded an image of a plane, which we'll use as our game sprite.
The x
and y
variables represent the current position of our plane. The speed
variable represents the speed at which our plane is moving.
The draw()
function is where all of the game logic happens. It first clears the canvas using ctx.clearRect()
, then draws our plane image using ctx.drawImage()
.
The if
statement checks to see if our plane has hit the left or right edge of the canvas. If it has, we reverse its direction by changing the speed
variable. Finally, we use requestAnimationFrame()
to call the draw()
function again, creating an infinite loop.
Step 3: Adding User Input
Now let's add user input to our game. We'll use the arrow keys to move the plane up and down. Add the following code to the bottom of your app.js
file:
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This code listens for keydown events on the document object. If the arrow up key is pressed, we move the plane up by subtracting 10 from the y
variable. If the arrow down key is pressed, we move the plane down by adding 10 to the y
variable.
Step 4: Adding Obstacles
Finally, let's add some obstacles to our game. We'll use rectangles that move across the screen at random intervals. Add the following code to your app.js
file:
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