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漂亮的动态气泡背景效果bubbly-bg.js

 5 years ago
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bubbly-bg.js是一款漂亮的动态气泡背景js插件。它是基于HTML5 canvas，压缩后的版本小于1kb，但是它能制作出各种漂亮的动态气泡背景效果，非常强大。

查看演示 下载源码

使用

可以通过npm来安装bubbly-bg.js动态气泡背景插件。

npm install bubbly-bg --save

可以在页面中引入bubbly-bg.js文件。

<script type="text/javascript" src="path/to/js/bubbly-bg.js"></script>

HTML结构

如果你不指定 <canvas> 元素作为容器，而是直接在 body 中初始化插件，那么插件会在body之后创建一个<canvas>元素，这个元素具有 position: fixed 和 z-index: -1 属性，并且它的宽度和高度始终会等于视口的宽度和高度。例如： 

<body>
  ...
  <script src="js/bubbly-bg.js"></script>
  <script>bubbly();</script>
</body>

你也可以指定一个 <canvas> 作为动态气泡背景的容器。例如： 

<canvas id="demo" width="400" height="300"></canvas>

然后通过下面的方法来初始化。

bubbly({
  canvas: document.getElementById("demo")
});

配置参数

bubbly-bg.js动态气泡背景插件的可用配置参数有：

bubbly({
    animate: false, // default is true
    blur: 1, // default is 4
    bubbleFunc: () => `hsla(${Math.random() * 360}, 100%, 50%, ${Math.random() * 0.25})`, // default is () => `hsla(0, 0%, 100%, ${r() * 0.1})`)
    bubbles: 100, // default is Math.floor((canvas.width + canvas.height) * 0.02);
    canvas: document.querySelector("#background"), // default is created and attached
    colorStart: "#4c004c", // default is blue-ish
    colorStop: "#1a001a",// default is blue-ish
    compose: "lighter", // default is "lighter"
    shadowColor: "#0ff", // default is #fff
});

示例，黄色/粉色带红色/橙色/黄色气泡效果：

bubbly({
    colorStart: "#fff4e6",
    colorStop: "#ffe9e4",
    blur: 1,
    compose: "source-over",
    bubbleFunc: () => `hsla(${Math.random() * 50}, 100%, 50%, .3)`
});

该项目的github地址： https://github.com/tipsy/bubbly-bg .


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