The content of this article is about how to use HTML to achieve the effect of meteor shower (code). It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.
<!doctype html>
<html>
<head>
<meta charset="GB2312" />
<title>流星雨</title>
<meta name="keywords" content="关键词，关键字">
<meta name="description" content="描述信息">
<style>
body {
margin: 0;
overflow: hidden;
}
</style>
</head>
<body>
<!--
<canvas>画布 画板 画画的本子
-->
<canvas width=400 height=400 style="background:#000000;" id="canvas"></canvas>
<!--
javascript
画笔
-->
<script>
//获取画板
//doccument 当前文档
//getElement 获取一个标签
//ById 通过Id名称的方式
//var 声明一片空间
//var canvas 声明一片空间的名字叫做canvas
var canvas = document.getElementById("canvas");
//获取画板权限 上下文
var ctx = canvas.getContext("2d");
//让画板的大小等于屏幕的大小
/*
思路：
1.获取屏幕对象
2.获取屏幕的尺寸
3.屏幕的尺寸赋值给画板
*/
//获取屏幕对象
var s = window.screen;
//获取屏幕的宽度和高度
var w = s.width;
var h = s.height;
//设置画板的大小
canvas.width = w;
canvas.height = h;
//设置文字大小
var fontSize = 14;
//计算一行有多少个文字 取整数 向下取整
var clos = Math.floor(w/fontSize);
//思考每一个字的坐标
//创建数组把clos 个 0 （y坐标存储起来）
var drops = [];
var str = "qwertyuiopasdfghjklzxcvbnm";
//往数组里面添加 clos 个 0
for(var i = 0;i<clos;i++) {
drops.push(0);
}
//绘制文字
function drawString() {
//给矩形设置填充色
ctx.fillStyle="rgba(0,0,0,0.05)"
//绘制一个矩形
ctx.fillRect(0,0,w,h);
//添加文字样式
ctx.font = "600 "+fontSize+"px 微软雅黑";
//设置文字颜色
ctx.fillStyle = "#ff2d2d";
for(var i = 0;i<clos;i++) {
//x坐标
var x = i*fontSize;
//y坐标
var y = drops[i]*fontSize;
//设置绘制文字
ctx.fillText(str[Math.floor(Math.random()*str.length)],x,y);
if(y>h&&Math.random()>0.99){
drops[i] = 0;
}
drops[i]++;
}
}
//定义一个定时器，每隔30毫秒执行一次
setInterval(drawString,30);
</script>
</body>
</html>Related recommendations:
Pure css3 Meteor Shower_html/css_WEB-ITnose
htmlRealize the rain effect on the picture_html/css_WEB-ITnose
The above is the detailed content of How to use html to achieve the effect of meteor shower (code). For more information, please follow other related articles on the PHP Chinese website!
HTML vs. CSS vs. JavaScript: A Comparative OverviewApr 16, 2025 am 12:04 AMThe roles of HTML, CSS and JavaScript in web development are: HTML is responsible for content structure, CSS is responsible for style, and JavaScript is responsible for dynamic behavior. 1. HTML defines the web page structure and content through tags to ensure semantics. 2. CSS controls the web page style through selectors and attributes to make it beautiful and easy to read. 3. JavaScript controls web page behavior through scripts to achieve dynamic and interactive functions.
HTML: Is It a Programming Language or Something Else?Apr 15, 2025 am 12:13 AMHTMLisnotaprogramminglanguage;itisamarkuplanguage.1)HTMLstructuresandformatswebcontentusingtags.2)ItworkswithCSSforstylingandJavaScriptforinteractivity,enhancingwebdevelopment.
HTML: Building the Structure of Web PagesApr 14, 2025 am 12:14 AMHTML is the cornerstone of building web page structure. 1. HTML defines the content structure and semantics, and uses, etc. tags. 2. Provide semantic markers, such as, etc., to improve SEO effect. 3. To realize user interaction through tags, pay attention to form verification. 4. Use advanced elements such as, combined with JavaScript to achieve dynamic effects. 5. Common errors include unclosed labels and unquoted attribute values, and verification tools are required. 6. Optimization strategies include reducing HTTP requests, compressing HTML, using semantic tags, etc.
From Text to Websites: The Power of HTMLApr 13, 2025 am 12:07 AMHTML is a language used to build web pages, defining web page structure and content through tags and attributes. 1) HTML organizes document structure through tags, such as,. 2) The browser parses HTML to build the DOM and renders the web page. 3) New features of HTML5, such as, enhance multimedia functions. 4) Common errors include unclosed labels and unquoted attribute values. 5) Optimization suggestions include using semantic tags and reducing file size.
Understanding HTML, CSS, and JavaScript: A Beginner's GuideApr 12, 2025 am 12:02 AMWebdevelopmentreliesonHTML,CSS,andJavaScript:1)HTMLstructurescontent,2)CSSstylesit,and3)JavaScriptaddsinteractivity,formingthebasisofmodernwebexperiences.
The Role of HTML: Structuring Web ContentApr 11, 2025 am 12:12 AMThe role of HTML is to define the structure and content of a web page through tags and attributes. 1. HTML organizes content through tags such as , making it easy to read and understand. 2. Use semantic tags such as, etc. to enhance accessibility and SEO. 3. Optimizing HTML code can improve web page loading speed and user experience.
HTML and Code: A Closer Look at the TerminologyApr 10, 2025 am 09:28 AMHTMLisaspecifictypeofcodefocusedonstructuringwebcontent,while"code"broadlyincludeslanguageslikeJavaScriptandPythonforfunctionality.1)HTMLdefineswebpagestructureusingtags.2)"Code"encompassesawiderrangeoflanguagesforlogicandinteract
HTML, CSS, and JavaScript: Essential Tools for Web DevelopersApr 09, 2025 am 12:12 AMHTML, CSS and JavaScript are the three pillars of web development. 1. HTML defines the web page structure and uses tags such as, etc. 2. CSS controls the web page style, using selectors and attributes such as color, font-size, etc. 3. JavaScript realizes dynamic effects and interaction, through event monitoring and DOM operations.
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
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Dreamweaver Mac version
Visual web development tools
DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software
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.
ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment
SublimeText3 English version
Recommended: Win version, supports code prompts!
