本文实例为大家分享了js实现可爱的气泡特效的具体代码,供大家参考,具体内容如下
代码:
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<!DOCTYPE html>
< html lang = "en" >
< head >
< meta charset = "UTF-8" >
< meta name = "viewport" content = "width=device-width, initial-scale=1.0" >
< title >Document</ title >
</ head >
< body >
< canvas id = "myCanvas" ></ canvas >
< script >
var c = document.getElementById("myCanvas");
c.width = 300;
c.height = 500;
var ctx = c.getContext('2d');
var arr = []
function sui() {
var r = Math.floor(Math.random() * 6 + 5);
var x = Math.floor(Math.random() * (c.width - 2 * r)) + r;
var y = c.height - r;
var opacity = Math.random();
var red = Math.floor(Math.random() * 256);
var green = Math.floor(Math.random() * 256);
var blue = Math.floor(Math.random() * 256);
var deg = 0;
var scale = Math.floor(Math.random() * 6 + 10);
arr.push({
x,
y,
r,
red,
green,
blue,
opacity,
deg,
scale
})
}
setInterval(sui, 40);
// 再实现变大和绘制
function dan() {
ctx.clearRect(0, 0, c.width, c.height);
arr.forEach((item, i) => {
item.deg += 0.5;
item.y -= item.deg;
item.x += Math.sin(item.deg) * item.scale;
if (item.y <= item.r) {
arr.splice(i, 1);
} else {
ctx.beginPath();
ctx.arc(item.x, item.y, item.r, 0, Math.PI * 2);
ctx.fillStyle = `rgba(${item.red},${item.green},${item.blue},${item.opacity})`;
ctx.fill();
}
})
}
setInterval(dan, 100);
</ script >
</ body >
</ html >
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以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/jvhbi/article/details/108354425