premise:
To implement a Tetris game for PC and mobile on the web page, you can use HTML, CSS and JavaScript. HTML5's Canvas element allows you to easily draw graphics on web pages. Here are some basic steps to implement the game:
Setting up HTML structure:
Create an HTML file, set the basic HTML structure, including<!DOCTYPE>, <html>, <head>and<body>Label.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Tetris</title>
<link rel="stylesheet" href="" rel="external nofollow" >
</head>
<body>
<canvas width="320" height="640"></canvas>
<script src=""></script>
</body>
</html>Create a CSS style:
In a nameSet basic styles in the file. For example, center the game canvas:
body {
display: flex;
justify-content: center;
align-items: center;
height: 100vh;
margin: 0;
background-color: #222;
}
canvas {
border: 1px solid #fff;
}Write JavaScript code:
In a namewrite the logic of the game in the file. Implement the following functions:
- Define the shape and color of the square
- Initialize game variables and canvas
- Define the game loop
- Process user input
- Define block movement and rotation logic
- Check and eliminate filled lines
- Determine the end conditions of the game
Responsive design:
Make sure the game performs well on different screen sizes and devices.
It can be implemented through media query in CSS:
@media (max-width: 600px) {
canvas {
width: 100%;
height: auto;
}
}Add touch event support:
In order for the game to run properly on mobile devices, you need to handle touch events. Can use JavaScripttouchstart、touchmoveandtouchendevent. Simulate keyboard operations according to the user's touch behavior, such as sliding left and right to move the block, sliding downward to accelerate the fall, and sliding upward to rotate the block.
Test and optimize:
Test the game on different devices and browsers to make sure it works properly. It can be adjusted and optimized as needed.
After completing the above steps, you will successfully create a Tetris game for both PC and mobile. You can adjust the appearance and functionality of the game according to your needs.
Code example:
Here is a sample code for a basic Tetris game implemented using JavaScript. This code includes the game logic mentioned in the third point. Please note that this code is only an example and you may need to adjust it according to your actual needs.
const canvas = ("gameCanvas");
const ctx = ("2d");
const scale = 20;
const tetrominoes = [
[
[1, 1, 1],
[0, 1, 0]
],
[
[1, 1],
[1, 1]
],
[
[1, 1, 0],
[0, 1, 1]
],
[
[0, 1, 1],
[1, 1, 0]
],
[
[1, 1, 1, 1]
],
[
[1, 1, 1],
[1, 0, 0]
],
[
[1, 1, 1],
[0, 0, 1]
]
];
const colors = [
"#00FFFF",
"#FFFF00",
"#FF00FF",
"#00FF00",
"#0000FF",
"#FFA500",
"#FF0000"
];
let board = ({ length: / scale }, () =>
Array( / scale).fill(0)
);
class Tetromino {
constructor() {
= (() * );
= tetrominoes[];
= colors[];
= (board[0].length / 2) - ([0].length / 2);
= 0;
}
draw() {
((row, i) => {
((value, j) => {
if (value) {
= ;
(( + j) * scale, ( + i) * scale, scale, scale);
= "#000";
(( + j) * scale, ( + i) * scale, scale, scale);
}
});
});
}
move(dir) {
+= dir;
if (()) {
-= dir;
return;
}
();
}
rotate() {
const temp = ;
= ();
if (()) {
= temp;
return;
}
();
}
drop() {
+= 1;
if (()) {
-= 1;
();
();
return new Tetromino();
}
();
return this;
}
collides() {
for (let y = 0; y < ; y++) {
for (let x = 0; x < [y].length; x++) {
if (
[y][x] &&
(board[y + ] && board[y + ][x + ]) !== undefined
) {
if (board[y + ][x + ]) {
return true;
}
} else {
return true;
}
}
}
return false;
}
lock() {
((row, i) => {
((value, j) => {
if (value) {
board[ + i][ + j] = ;
}
});
});
}
checkLines() {
outer: for (let y = - 1; y >= 0; ) {
for (let x = 0; x < board[y].length; x++) {
if (!board[y][x]) {
y--;
continue outer;
}
}
(y, 1);
(Array(board[0].length).fill(0));
}
}
transpose(matrix) {
const rows = ;
const cols = matrix[0].length;
const result = ({ length: cols }, () => Array(rows).fill(0));
for (let y = 0; y < rows; y++) {
for (let x = 0; x < cols; x++) {
result[x][y] = matrix[y][x];
}
}
return ();
}
}
function drawBoard() { = "#000"; (0, 0, , );
((row, y) => {
((value, x) => {
if (value) {
= value;
(x * scale, y * scale, scale, scale);
= "#000";
(x * scale, y * scale, scale, scale);
}
});
});
let piece = new Tetromino(); let dropCounter = 0; let dropInterval = 1000; let lastTime = 0;
function update(time = 0) { const deltaTime = time - lastTime; lastTime = time;
dropCounter += deltaTime;
if (dropCounter > dropInterval) {
piece = ();
dropCounter = 0;
}
drawBoard();
();
requestAnimationFrame(update);
}
update();
("keydown", (event) => { if ( === "ArrowLeft") { (-1); } else if ( === "ArrowRight") { (1); } else if ( === "ArrowDown") { dropInterval = 50; } else if ( === "ArrowUp") { (); } });
("keyup", (event) => { if ( === "ArrowDown") { dropInterval = 1000; } });
This code implements a simple Tetris game, including drawing the game canvas, moving the tetras, rotating and falling, eliminating filled rows, etc. To make the game more complete and easy to operate, you also need to add touch event support to the game according to the instructions in point 5.
At the same time, it is also recommended that you optimize the game's functions, appearance and performance according to your needs and preferences.
This is the article about using JS+CSS to implement Tetris games. For more related content on JS+CSS to implement Tetris, please search for my previous articles or continue browsing the related articles below. I hope everyone will support me in the future!