js拖动滚动条模仿日出东方效果代码-html代码-BFW代码库

js拖动滚动条模仿日出东方效果代码

代码语言：html

所属分类：动画

代码描述：js拖动滚动条模仿日出东方效果代码

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

<html lang="en"><head>

  <meta charset="UTF-8">
  

  
  
  
<style>
html {
  background-color: #000700;
  color: #fff;
  font-family: sans-serif;
  display: flex;
  min-height: 100%;
}

body {
  min-width: 100%;
  min-height: 100%;
  margin: 0;
}

canvas.sunrise {
  box-shadow: 0px 0px 25px 5px rgba(0, 0, 0, 0.35);
}

.container {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  margin: auto;
  width: 800px;
  height: 800px;

  display: flex;
  flex-direction: column;
  justify-content: center;
}

input[type="range"]::-moz-range-track {
  background-color: blue;
}

canvas.backdrop {
  position: absolute;
  width: 100vw;
  height: 100vh;
  filter: blur(100px);
  opacity: 0.5;
}
</style>




</head>

<body >
  <canvas width="800" height="600" class="backdrop"></canvas>
<div class="container">
  <canvas class="sunrise" width="800" height="600"></canvas>
  <input type="range" min="0" max="9500" step="1" id="range" value="0">
  <div>
    <label>glow enabled
      <input type="checkbox" checked="" id="glow_enabled">
    </label>
    <label>filter enabled
      <input type="checkbox" checked="" id="filter_enabled">
    </label>
  </div>
</div>

  
      <script >
const { PI, random, min } = Math;
const canvas = document.querySelector("canvas.sunrise");
const ctx = canvas.getContext("2d");
const ctxBackdrop = document.querySelector("canvas.backdrop").getContext("2d");
const { width, height } = canvas.getBoundingClientRect();
const center = { x: width / 2, y: height / 2 };
let currentFrame = 0;
let glow_enabled = true;
let filter_enabled = true;

const inputs = document.
querySelectorAll("input[type='checkbox']").
forEach(input => {
  input.addEventListener("change", e => {
    switch (e.target.id) {
      case "glow_enabled":
        glow_enabled = e.target.checked;
        draw(currentFrame);
        break;
      case "filter_enabled":
        filter_enabled = e.target.checked;
        draw(currentFrame);
        break;}

  });
});

document.querySelector("input[type='range']").addEventListener("input", e => {
  requestAnimationFrame(() => {
    currentFrame = e.target.value;
    draw(currentFrame);
  });
});

function createRandom() {
  var numbers = [];
  return function r(i) {
    if (numbers.length >= i) {
      return numbers[i];
    } else {
      let n = random();
      numbers.push(n);
      return n;
    }
  };
}

const random2 = createRandom();

function drawStars(ctx) {
  ctx.fillStyle = "white";
  for (let i = 0; i < 1000; i++) {
    ctx.globalAlpha = random2(i) * 0.5;
    ctx.fillRect(
    random2(i + 1) * width,
    random2(i + 2) * height,
    random2(i + 3) * 2,
    random2(i + 4) * 2);

  }

  return ctx;
}

function drawSky(color) {
  return ctx => {
    ctx.fillStyle = color;
    ctx.fillRect(0, 0, width, height);

    return ctx;
  };
}

function drawForeground(color) {
  return ctx => {
    ctx.fillStyle = color;
    ctx.fillRect(0, center.y + 100, width, height);

    return ctx;
  };
}

function drawCircle(x, y, radius, ctx) {
  return ctx => {
    ctx.fillStyle = "white";

    ctx.beginPath();
    ctx.arc(x, y, .........完整代码请登录后点击上方下载按钮下载查看