css3文本域焦点烟花效果
2024-08-29 20:20:36
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style type="text/css">
textarea {
display: block;
font-size: 1.4rem;
padding: 18px 14px;
color: #adadad;
box-sizing: border-box;
width: 80%;
height: 100px;
padding: 10px 14px;
line-height: 1.5;
-moz-box-sizing: border-box;
box-sizing: border-box;
border-color: #efefef;margin:50px; resize:vertical;
max-height: 400px;
}
/* resize:horizontal 宽度可调整 */
</style>
</head>
<body>
<textarea class="comment-textarea" id="comment" placeholder="说点什么吧..." tabindex="4" ></textarea >
<script type="text/javascript">
!(function webpackUniversalModuleDefinition(root, factory) {
if (typeof exports === 'object' && typeof module === 'object') module.exports = factory();
else if (typeof define === 'function' && define.amd) define([], factory);
else if (typeof exports === 'object') exports["POWERMODE"] = factory();
else root["POWERMODE"] = factory()
})(this, function() {
return (function(modules) {
var installedModules = {}; function __webpack_require__(moduleId) {
if (installedModules[moduleId]) return installedModules[moduleId].exports;
var module = installedModules[moduleId] = {
exports: {},
id: moduleId,
loaded: false
};
modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);
module.loaded = true;
return module.exports
}
__webpack_require__.m = modules;
__webpack_require__.c = installedModules;
__webpack_require__.p = "";
return __webpack_require__(0)
})([function(module, exports, __webpack_require__) {
'use strict';
var canvas = document.createElement('canvas');
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
canvas.style.cssText = 'position:fixed;top:0;left:0;pointer-events:none;z-index:999999';
window.addEventListener('resize', function() {
canvas.width = window.innerWidth;
canvas.height = window.innerHeight
});
document.body.appendChild(canvas);
var context = canvas.getContext('2d');
var particles = [];
var particlePointer = 0;
POWERMODE.shake = true; function getRandom(min, max) {
return Math.random() * (max - min) + min
}
function getColor(el) {
if (POWERMODE.colorful) {
var u = getRandom(0, 360);
return 'hsla(' + getRandom(u - 10, u + 10) + ', 100%, ' + getRandom(50, 80) + '%, ' + 1 + ')'
} else {
return window.getComputedStyle(el).color
}
}
function getCaret() {
var el = document.activeElement;
var bcr;
if (el.tagName === 'TEXTAREA' || (el.tagName === 'INPUT' && el.getAttribute('type') === 'text')) {
var offset = __webpack_require__(1)(el, el.selectionStart);
bcr = el.getBoundingClientRect();
return {
x: offset.left + bcr.left,
y: offset.top + bcr.top,
color: getColor(el)
}
}
var selection = window.getSelection();
if (selection.rangeCount) {
var range = selection.getRangeAt(0);
var startNode = range.startContainer;
if (startNode.nodeType === document.TEXT_NODE) {
startNode = startNode.parentNode
}
bcr = range.getBoundingClientRect();
return {
x: bcr.left,
y: bcr.top,
color: getColor(startNode)
}
}
return {
x: 0,
y: 0,
color: 'transparent'
}
}
function createParticle(x, y, color) {
return {
x: x,
y: y,
alpha: 1,
color: color,
velocity: {
x: -1 + Math.random() * 2,
y: -3.5 + Math.random() * 2
}
}
}
function POWERMODE() {
{
var caret = getCaret();
var numParticles = 5 + Math.round(Math.random() * 10);
while (numParticles--) {
particles[particlePointer] = createParticle(caret.x, caret.y, caret.color);
particlePointer = (particlePointer + 1) % 500
}
} {
if (POWERMODE.shake) {
var intensity = 1 + 2 * Math.random();
var x = intensity * (Math.random() > 0.5 ? -1 : 1);
var y = intensity * (Math.random() > 0.5 ? -1 : 1);
document.body.style.marginLeft = x + 'px';
document.body.style.marginTop = y + 'px';
setTimeout(function() {
document.body.style.marginLeft = '';
document.body.style.marginTop = ''
}, 75)
}
}
};
POWERMODE.colorful = false; function loop() {
requestAnimationFrame(loop);
context.clearRect(0, 0, canvas.width, canvas.height);
for (var i = 0; i < particles.length; ++i) {
var particle = particles[i];
if (particle.alpha <= 0.1) continue;
particle.velocity.y += 0.075;
particle.x += particle.velocity.x;
particle.y += particle.velocity.y;
particle.alpha *= 0.96;
context.globalAlpha = particle.alpha;
context.fillStyle = particle.color;
context.fillRect(Math.round(particle.x - 1.5), Math.round(particle.y - 1.5), 3, 3)
}
}
requestAnimationFrame(loop);
module.exports = POWERMODE
}, function(module, exports) {
(function() {
var properties = ['direction', 'boxSizing', 'width', 'height', 'overflowX', 'overflowY', 'borderTopWidth', 'borderRightWidth', 'borderBottomWidth', 'borderLeftWidth', 'borderStyle', 'paddingTop', 'paddingRight', 'paddingBottom', 'paddingLeft', 'fontStyle', 'fontVariant', 'fontWeight', 'fontStretch', 'fontSize', 'fontSizeAdjust', 'lineHeight', 'fontFamily', 'textAlign', 'textTransform', 'textIndent', 'textDecoration', 'letterSpacing', 'wordSpacing', 'tabSize', 'MozTabSize'];
var isFirefox = window.mozInnerScreenX != null; function getCaretCoordinates(element, position, options) {
var debug = options && options.debug || false;
if (debug) {
var el = document.querySelector('#input-textarea-caret-position-mirror-div');
if (el) {
el.parentNode.removeChild(el)
}
}
var div = document.createElement('div');
div.id = 'input-textarea-caret-position-mirror-div';
document.body.appendChild(div);
var style = div.style;
var computed = window.getComputedStyle ? getComputedStyle(element) : element.currentStyle;
style.whiteSpace = 'pre-wrap';
if (element.nodeName !== 'INPUT') style.wordWrap = 'break-word';
style.position = 'absolute';
if (!debug) style.visibility = 'hidden';
properties.forEach(function(prop) {
style[prop] = computed[prop]
});
if (isFirefox) {
if (element.scrollHeight > parseInt(computed.height)) style.overflowY = 'scroll'
} else {
style.overflow = 'hidden'
}
div.textContent = element.value.substring(0, position);
if (element.nodeName === 'INPUT') div.textContent = div.textContent.replace(/\s/g, "\u00a0");
var span = document.createElement('span');
span.textContent = element.value.substring(position) || '.';
div.appendChild(span);
var coordinates = {
top: span.offsetTop + parseInt(computed['borderTopWidth']),
left: span.offsetLeft + parseInt(computed['borderLeftWidth'])
};
if (debug) {
span.style.backgroundColor = '#aaa'
} else {
document.body.removeChild(div)
}
return coordinates
}
if (typeof module != "undefined" && typeof module.exports != "undefined") {
module.exports = getCaretCoordinates
} else {
window.getCaretCoordinates = getCaretCoordinates
}
}())
}])
});
/* 调用*/
POWERMODE.colorful = true;POWERMODE.shake = false;document.body.addEventListener('input', POWERMODE);
</script>
</body>
</html>
最新文章
- 实体写到redis写不进去--误把类当成实体类
- 细说.NET中的多线程 (四 使用锁进行同步)
- POJ 2398 Toy Storage（计算几何，叉积判断点和线段的关系）
- Linux命令：scp命令(文件上传和下载)
- M - Candy Sharing Game
- SQL SERVER查看索引使用情况
- CSAPP缓冲区溢出攻击实验(下)
- Python注释、变量、常量
- 类 __getitem__ __getattr__ __call__
- tailf、tail -f、tail -F三者区别（转）
- 初入SpringBoot——使用IDEA构建最小SpringBootDemo
- BZOJ2173 整数的lqp拆分（生成函数）
- centos7.2环境中kettle环境搭建及任务推送配置详解
- .NET Core开发日志——Startup
- R语言入门
- mybatis学习 九 代理开发
- jQuery数组处理详解（转载）
- python连接redis，redis集群
- 记Git报错-Everything up-to-date
- 20155222卢梓杰 课堂测试ch06补做