Web Front-endJS TutorialA complete example of simple Tetris implementation in JavaScript_javascript skillsA complete example of simple Tetris implementation in JavaScript_javascript skills
The example in this article describes how to implement simple Tetris in JavaScript. Share it with everyone for your reference, the details are as follows:
Let’s take a look at the operation renderings first:
The complete example code is as follows:
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>俄罗斯方块</title>
<style type="text/css">
.c{margin:1px; width:19px; height:19px; background:red; position:absolute;}
.d{margin:1px; width:19px; height:19px; background:gray; position:absolute;}
.f{top:0px; left:0px; background:black; position:absolute;}
.e{top:0px; background:#151515; position:absolute;}
.g{width:100px; height:20px; color:white; position:absolute;}
</style>
<script type="text/javascript">
var row = 18;
var col = 10;
var announcement = 6;
var size = 20;
var isOver = false;
var shapes = ("0,1,1,1,2,1,3,1;1,0,1,1,1,2,2,2;2,0,2,1,2,2,1,2;0,1,1,1,1,2,2,2;1,2,2,2,2,1,3,1;1,1,2,1,1,2,2,2;0,2,1,2,1,1,2,2").split(";");
var tetris;
var container;
function createElm(tag,css)
{
var elm = document.createElement(tag);
elm.className = css;
document.body.appendChild(elm);
return elm;
}
function Tetris(css,x,y,shape)
{
// 创建4个div用来组合出各种方块
var myCss = css?css:"c";
this.divs = [createElm("div",myCss),createElm("div",myCss),createElm("div",myCss),createElm("div",myCss)];
if(!shape)
{
this.divs2 = [createElm("div",myCss),createElm("div",myCss),createElm("div",myCss),createElm("div",myCss)];
this.score = createElm("div","g");
this.score.style.top = 10*size+"px";
this.score.style.left = (col- -1)*size+"px";
this.score.innerHTML = "score:0";
}
this.container = null;
this.refresh = function()
{
this.x = (typeof(x)!='undefined')?x:3;
this.y = (typeof(y)!='undefined')?y:0;
// 如果有传参，优先使用参数的，如果有预告，优先使用预告，都没有就自己生成
if(shape)
this.shape = shape;
else if(this.shape2)
this.shape = this.shape2;
else
this.shape = shape?shape:shapes[Math.floor((Math.random()*shapes.length-0.000000001))].split(",");
this.shape2 = shapes[Math.floor((Math.random()*shapes.length-0.000000001))].split(",");
if(this.container && !this.container.check(this.x,this.y,this.shape))
{
isOver = true;
alert("游戏结束");
}
else
{
this.show();
this.showScore();
this.showAnnouncement();
}
}
// 显示方块
this.show = function()
{
for(var i in this.divs)
{
this.divs[i].style.top = (this.shape[i*2+1]- -this.y)*size+"px";
this.divs[i].style.left = (this.shape[i*2]- -this.x)*size+"px";
}
}
// 显示预告
this.showAnnouncement = function()
{
for(var i in this.divs2)
{
this.divs2[i].style.top = (this.shape2[i*2+1]- -1)*size+"px";
this.divs2[i].style.left = (this.shape2[i*2]- -1- -col)*size+"px";
}
}
// 显示分数
this.showScore = function()
{
if(this.container && this.score)
{
this.score.innerHTML = "score:" + this.container.score;
}
}
// 水平移动方块的位置
this.hMove = function(step)
{
if(this.container.check(this.x- -step,this.y,this.shape))
{
this.x += step;
this.show();
}
}
// 垂直移动方块位置
this.vMove = function(step)
{
if(this.container.check(this.x,this.y- -step,this.shape))
{
this.y += step;
this.show();
}
else
{
this.container.fixShape(this.x,this.y,this.shape);
this.container.findFull();
this.refresh();
}
}
// 旋转方块
this.rotate = function()
{
var newShape = [this.shape[1],3-this.shape[0],this.shape[3],3-this.shape[2],this.shape[5],3-this.shape[4],this.shape[7],3-this.shape[6]];
if(this.container.check(this.x,this.y,newShape))
{
this.shape = newShape;
this.show();
}
}
this.refresh();
}
function Container()
{
this.init = function()
{
// 绘制方块所在区域
var bgDiv = createElm("div","f");
bgDiv.style.width = size*col+"px";
bgDiv.style.height = size*row+"px";
// 绘制预告所在区域
var bgDiv = createElm("div","e");
bgDiv.style.left = size*col+"px";
bgDiv.style.width = size*announcement+"px";
bgDiv.style.height = size*row+"px";
// 清空积分
this.score = 0;
}
this.check = function(x,y,shape)
{
// 检查边界越界
var flag = false;
var leftmost=col;
var rightmost=0;
var undermost=0;
for(var i=0;i<8;i+=2)
{
// 记录最左边水平坐标
if(shape[i]<leftmost)
leftmost = shape[i];
// 记录最右边水平坐标
if(shape[i]>rightmost)
rightmost = shape[i];
// 记录最下边垂直坐标
if(shape[i+1]>undermost)
undermost = shape[i+1];
// 判断是否碰撞
if(this[(shape[i+1]- -y)*100- -(shape[i]- -x)])
flag = true;
}
// 判断是否到达极限高度
for(var m=0;m<3;m++)
for(var n=0;n<col;n++)
if(this[m*100+n])
flag = true;
if((rightmost- -x+1)>col || (leftmost- -x)<0 || (undermost- -y+1)>row || flag)
return false;
return true;
}
// 用灰色方块替换红色方块，并在容器中记录灰色方块的位置
this.fixShape = function(x,y,shape)
{
var t = new Tetris("d",x,y,shape);
for(var i=0;i<8;i+=2)
this[(shape[i+1]- -y)*100- -(shape[i]- -x)] = t.divs[i/2];
}
// 遍历整个容器，判断是否可以消除
this.findFull = function()
{
var s = 0;
for(var m=0;m<row;m++)
{
var count = 0;
for(var n=0;n<col;n++)
if(this[m*100+n])
count++;
if(count==col)
{
s++;
this.removeLine(m);
}
}
this.score -= -this.calScore(s);
}
this.calScore = function(s)
{
if(s!=0)
return s- -this.calScore(s-1)
else
return 0;
}
// 消除指定一行方块
this.removeLine = function(row)
{
// 移除一行方块
for(var n=0;n<col;n++)
document.body.removeChild(this[row*100+n]);
// 把所消除行上面所有的方块下移一行
for(var i=row;i>0;i--)
{
for(var j=0;j<col;j++)
{
this[i*100- -j] = this[(i-1)*100- -j]
if(this[i*100- -j])
this[i*100- -j].style.top = i*size + "px";
}
}
}
}
function init()
{
container = new Container();
container.init();
tetris = new Tetris();
tetris.container = container;
document.onkeydown = function(e)
{
if(isOver) return;
var e = window.event?window.event:e;
switch(e.keyCode)
{
case 38: //up
tetris.rotate();
break;
case 40: //down
tetris.vMove(1);
break;
case 37: //left
tetris.hMove(-1);
break;
case 39: //right
tetris.hMove(1);
break;
}
}
setInterval("if(!isOver) tetris.vMove(1)",500);
}
</script>
</head>
<body onload="init()">
</body>
</html>
Readers who are interested in more JavaScript-related content can check out the special topics on this site: "Summary of JavaScript search algorithm techniques", "Summary of JavaScript animation special effects and techniques", "Summary of JavaScript errors and debugging techniques", "Summary of JavaScript data structures and algorithm techniques", "Summary of JavaScript traversal algorithms and techniques" and "JavaScript Mathematics Summary of operation usage》
I hope this article will be helpful to everyone in JavaScript programming.
Python vs. JavaScript: A Comparative Analysis for DevelopersMay 09, 2025 am 12:22 AMThe main difference between Python and JavaScript is the type system and application scenarios. 1. Python uses dynamic types, suitable for scientific computing and data analysis. 2. JavaScript adopts weak types and is widely used in front-end and full-stack development. The two have their own advantages in asynchronous programming and performance optimization, and should be decided according to project requirements when choosing.
Python vs. JavaScript: Choosing the Right Tool for the JobMay 08, 2025 am 12:10 AMWhether to choose Python or JavaScript depends on the project type: 1) Choose Python for data science and automation tasks; 2) Choose JavaScript for front-end and full-stack development. Python is favored for its powerful library in data processing and automation, while JavaScript is indispensable for its advantages in web interaction and full-stack development.
Python and JavaScript: Understanding the Strengths of EachMay 06, 2025 am 12:15 AMPython and JavaScript each have their own advantages, and the choice depends on project needs and personal preferences. 1. Python is easy to learn, with concise syntax, suitable for data science and back-end development, but has a slow execution speed. 2. JavaScript is everywhere in front-end development and has strong asynchronous programming capabilities. Node.js makes it suitable for full-stack development, but the syntax may be complex and error-prone.
JavaScript's Core: Is It Built on C or C ?May 05, 2025 am 12:07 AMJavaScriptisnotbuiltonCorC ;it'saninterpretedlanguagethatrunsonenginesoftenwritteninC .1)JavaScriptwasdesignedasalightweight,interpretedlanguageforwebbrowsers.2)EnginesevolvedfromsimpleinterpreterstoJITcompilers,typicallyinC ,improvingperformance.
JavaScript Applications: From Front-End to Back-EndMay 04, 2025 am 12:12 AMJavaScript can be used for front-end and back-end development. The front-end enhances the user experience through DOM operations, and the back-end handles server tasks through Node.js. 1. Front-end example: Change the content of the web page text. 2. Backend example: Create a Node.js server.
Python vs. JavaScript: Which Language Should You Learn?May 03, 2025 am 12:10 AMChoosing Python or JavaScript should be based on career development, learning curve and ecosystem: 1) Career development: Python is suitable for data science and back-end development, while JavaScript is suitable for front-end and full-stack development. 2) Learning curve: Python syntax is concise and suitable for beginners; JavaScript syntax is flexible. 3) Ecosystem: Python has rich scientific computing libraries, and JavaScript has a powerful front-end framework.
JavaScript Frameworks: Powering Modern Web DevelopmentMay 02, 2025 am 12:04 AMThe power of the JavaScript framework lies in simplifying development, improving user experience and application performance. When choosing a framework, consider: 1. Project size and complexity, 2. Team experience, 3. Ecosystem and community support.
The Relationship Between JavaScript, C , and BrowsersMay 01, 2025 am 12:06 AMIntroduction I know you may find it strange, what exactly does JavaScript, C and browser have to do? They seem to be unrelated, but in fact, they play a very important role in modern web development. Today we will discuss the close connection between these three. Through this article, you will learn how JavaScript runs in the browser, the role of C in the browser engine, and how they work together to drive rendering and interaction of web pages. We all know the relationship between JavaScript and browser. JavaScript is the core language of front-end development. It runs directly in the browser, making web pages vivid and interesting. Have you ever wondered why JavaScr
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
WebStorm Mac version
Useful JavaScript development tools
SublimeText3 Linux new version
SublimeText3 Linux latest version
SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.
SublimeText3 Chinese version
Chinese version, very easy to use
Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.
