Anime.js 实现带有描边动画效果的复选框攻略
简介
Anime.js 是一个轻量级的 JavaScript 动画库,可以用来快速的创建各种各样的动画效果。本攻略将介绍如何通过 Anime.js 实现带有描边动画效果的复选框。
步骤
1. 安装 Anime.js
我们首先需要安装 Anime.js,可以通过 npm 或者直接下载源码安装。
npm install animejs
或者直接下载最新的 Anime.js 源码。
2. HTML 结构
我们需要先创建一个 HTML 结构,这里我们以一个简单的复选框为例。
<input type="checkbox" id="checkbox">
<label for="checkbox">复选框</label>
3. CSS 样式
我们需要为复选框添加一些基础样式和动画效果。
input[type="checkbox"] {
display: none;
}
label {
position: relative;
padding-left: 30px;
cursor: pointer;
}
label:before {
content: "";
display: inline-block;
position: absolute;
width: 20px;
height: 20px;
border: 2px solid #999;
left: 0;
bottom: 2px;
}
label:after {
content: "";
display: inline-block;
position: absolute;
width: 10px;
height: 10px;
background-color: #fff;
left: 5px;
bottom: 7px;
opacity: 0;
transition: opacity 0.1s ease-in-out;
}
input[type="checkbox"]:checked + label:after {
opacity: 1;
}
4. Anime.js 配置
我们需要配置 Anime.js 的参数,创建一个描边动画效果。
const checkbox = document.querySelector('#checkbox');
const path = anime.path('path');
const timeline = anime.timeline({
autoplay: false
});
timeline
.add({
targets: path,
strokeDashoffset: [anime.setDashoffset, 0],
duration: 300,
easing: 'easeInOutSine'
})
.add({
targets: path,
strokeDashoffset: [0, -anime.setDashoffset],
duration: 300,
easing: 'easeInOutSine'
});
checkbox.addEventListener('change', () => {
if (checkbox.checked) {
timeline.play();
} else {
timeline.reverse();
}
});
5. 完整实例
我们可以通过下面的完整示例来查看整个过程。
HTML
<head>
<meta charset="UTF-8">
<title>Anime.js 实现带有描边动画效果的复选框</title>
<link rel="stylesheet" href="./style.css">
</head>
<body>
<input type="checkbox" id="checkbox">
<label for="checkbox">复选框</label>
<svg viewBox="0 0 100 50" width="0" height="0">
<path d="M 0 25 C 20 45 80 45 100 25 C 80 5 20 5 0 25" fill="transparent" stroke="#FFBFBF" stroke-width="2" />
</svg>
<script src="./anime.min.js"></script>
<script src="./script.js"></script>
</body>
CSS
input[type="checkbox"] {
display: none;
}
label {
position: relative;
padding-left: 30px;
cursor: pointer;
}
label:before {
content: "";
display: inline-block;
position: absolute;
width: 20px;
height: 20px;
border: 2px solid #999;
left: 0;
bottom: 2px;
}
label:after {
content: "";
display: inline-block;
position: absolute;
width: 10px;
height: 10px;
background-color: #fff;
left: 5px;
bottom: 7px;
opacity: 0;
transition: opacity 0.1s ease-in-out;
}
input[type="checkbox"]:checked + label:after {
opacity: 1;
}
JavaScript
const checkbox = document.querySelector('#checkbox');
const path = anime.path('path');
const timeline = anime.timeline({
autoplay: false
});
timeline
.add({
targets: path,
strokeDashoffset: [anime.setDashoffset, 0],
duration: 300,
easing: 'easeInOutSine'
})
.add({
targets: path,
strokeDashoffset: [0, -anime.setDashoffset],
duration: 300,
easing: 'easeInOutSine'
});
checkbox.addEventListener('change', () => {
if (checkbox.checked) {
timeline.play();
} else {
timeline.reverse();
}
});
示例说明
示例一
我们可以通过下面的示例来查看描边动画效果的实现过程。
<input type="checkbox" id="checkbox">
<label for="checkbox">复选框</label>
<svg viewBox="0 0 100 50" width="0" height="0">
<path d="M 0 25 C 20 45 80 45 100 25 C 80 5 20 5 0 25" fill="transparent" stroke="#FFBFBF" stroke-width="2" />
</svg>
<script src="./anime.min.js"></script>
<script>
const checkbox = document.querySelector('#checkbox');
const path = anime.path('path');
const timeline = anime.timeline({
autoplay: false
});
timeline
.add({
targets: path,
strokeDashoffset: [anime.setDashoffset, 0],
duration: 300,
easing: 'easeInOutSine'
})
.add({
targets: path,
strokeDashoffset: [0, -anime.setDashoffset],
duration: 300,
easing: 'easeInOutSine'
});
checkbox.addEventListener('change', () => {
if (checkbox.checked) {
timeline.play();
} else {
timeline.reverse();
}
});
</script>
<style>
input[type="checkbox"] {
display: none;
}
label {
position: relative;
padding-left: 30px;
cursor: pointer;
}
label:before {
content: "";
display: inline-block;
position: absolute;
width: 20px;
height: 20px;
border: 2px solid #999;
left: 0;
bottom: 2px;
}
label:after {
content: "";
display: inline-block;
position: absolute;
width: 10px;
height: 10px;
background-color: #fff;
left: 5px;
bottom: 7px;
opacity: 0;
transition: opacity 0.1s ease-in-out;
}
input[type="checkbox"]:checked + label:after {
opacity: 1;
}
</style>
示例二
我们可以通过下面的示例来查看复选框的基础样式和动画效果。
<input type="checkbox" id="checkbox">
<label for="checkbox">复选框</label>
<style>
input[type="checkbox"] {
display: none;
}
label {
position: relative;
padding-left: 30px;
cursor: pointer;
}
label:before {
content: "";
display: inline-block;
position: absolute;
width: 20px;
height: 20px;
border: 2px solid #999;
left: 0;
bottom: 2px;
}
label:after {
content: "";
display: inline-block;
position: absolute;
width: 10px;
height: 10px;
background-color: #fff;
left: 5px;
bottom: 7px;
opacity: 0;
transition: opacity 0.1s ease-in-out;
}
input[type="checkbox"]:checked + label:after {
opacity: 1;
}
</style>
总结
通过上面的攻略,我们可以使用 Anime.js 快速实现带有描边动画效果的复选框。如果需要更复杂的动画效果,可以参考 Anime.js 官方文档或者其他网上资源。
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