canvas层叠彩虹方块背景效果-html代码-BFW代码库

canvas层叠彩虹方块背景效果

代码语言：html

所属分类：背景

代码描述：canvas层叠彩虹方块背景效果

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">

<style>
body, html {
  margin: 0;
}

canvas {
  display: block;
  cursor: pointer;
}
</style>

</head>
<body translate="no">
<canvas id="canvas"></canvas>

<script>
/*
  Johan Karlsson, 2020
  https://twitter.com/DonKarlssonSan
  MIT License, see Details View
*/
let canvas;
let ctx;
let w, h;

function setup() {
  canvas = document.querySelector("#canvas");
  ctx = canvas.getContext("2d");
  reset();
  window.addEventListener("resize", () => {
    reset();
    draw();
  });
  canvas.addEventListener("click", draw);
}

function reset() {
  w = canvas.width = window.innerWidth;
  h = canvas.height = window.innerHeight;
}

function draw() {
  ctx.shadowColor = "#333";
  ctx.fillStyle = "white";
  ctx.fillRect(0, 0, w, h);
  drawRectangles();
}

function drawRectangles() {
  let size = Math.random() * 60 + 60.........完整代码请登录后点击上方下载按钮下载查看