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有位古人说过，人不是在烦的路上，就是正在烦！
最近在逛某乎，总是会刷到很多让人焦虑的话题！比如这样：
或者这样：
还有这样：
然后，就这么一焦虑，我就不怀好意的把目光转向了juejin，要不要把juejin砸了，让面向搜索编程者没有地儿找，少一些竞争者？
首先引入脑海的是二向箔，作为“吾主”最强大武器之一，我打算用这个收 juejin 首页！
说干就干！建个demo，打个样品：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Add Span to Each Character</title>
</head>
<body style="background-color: #fff;">
<!-- Your HTML content here -->
<p>This is some text.</p>
<div>
<p>More text here.</p>
<image src="./3333.png" />
<video></video>
</div>
<img src="./3333.png" />
<style>
.aaa {
height: 100px;
}
</style>
</body>
</html>
再来一段JS，用来模拟一根棍进入效果：
<script>
'use strict';
const targetNodeObject = document.body;
const styleElement = document.createElement('style');
const floatBall = document.createElement('div');
let center = { centerX: 0, centerY: 0 };
const timer = 32;
styleElement.textContent = `
.highlighted-text {
width: 4px;
height: 4px;
margin: 0 2px;
display: inline-block;
overflow: hidden;
background-color: #f00;
transition: all 1s;
}
.highlighted-image {
margin: 0 2px !important;
display: inline-block !important;
overflow: hidden !important;
background-color: #000 !important;
transition: all 1s;
transform-origin: center top;
}
.floating-ball {
width: 4px;
position:fixed;
height: 100px;
background: #000 !important;
animation: floatAnimation 0.2s linear infinite;
left: 50%;
top: -800px;
transition: top 1s ease;
z-index:9999;
border:1px solid #fff;
transform-origin: center center;
}
@keyframes floatAnimation {
to {
transform: rotate(360deg);
}
}
.inhaleAnimation{
position: fixed;
z-index:9999;
animation: inhaleAnimation 2s ease-out forwards;
}
@keyframes inhaleAnimation {
to {
transform: scale(0);
}
}
`;
document.head.appendChild(styleElement);
createAttack();
// 创建进攻武器 - 棍
function createAttack(callback) {
floatBall.classList.add('floating-ball');
targetNodeObject.appendChild(floatBall);
setTimeout(() => {
floatBall.style.top = "100px";
setTimeout(() => {
if (callback) callback();
}, 1000)
}, 100)
}
</script>
大致效果是这样：
好了，第一步完成，接下去想攻击效果，基本思路就是模拟二向箔。二向箔是三维物体二维化，那我们juejin首页是二维物体，那我就一维化。效果就是文字化成点。图片变成线。
完整代码如下：
<script>
'use strict';
const targetNodeObject = document.body;
const styleElement = document.createElement('style');
const floatBall = document.createElement('div');
let center = { centerX: 0, centerY: 0 };
const timer = 32;
styleElement.textContent = `
.highlighted-text {
width: 4px;
height: 4px;
margin: 0 2px;
display: inline-block;
overflow: hidden;
background-color: #f00;
transition: all 1s;
}
.highlighted-image {
margin: 0 2px !important;
display: inline-block !important;
overflow: hidden !important;
background-color: #000 !important;
transition: all 1s;
transform-origin: center top;
}
.floating-ball {
width: 4px;
position:fixed;
height: 100px;
background: #000 !important;
animation: floatAnimation 0.2s linear infinite;
left: 50%;
top: -800px;
transition: top 1s ease;
z-index:9999;
border:1px solid #fff;
transform-origin: center center;
}
@keyframes floatAnimation {
to {
transform: rotate(360deg);
}
}
.inhaleAnimation{
position: fixed;
z-index:9999;
animation: inhaleAnimation 2s ease-out forwards;
}
@keyframes inhaleAnimation {
to {
transform: scale(0);
}
}
`;
document.head.appendChild(styleElement);
function createBall(callback) {
floatBall.classList.add('floating-ball');
targetNodeObject.appendChild(floatBall);
setTimeout(() => {
floatBall.style.top = "100px";
setTimeout(() => {
if (callback) callback();
}, 1000)
}, 100)
}
createBall(() => {
init();
center = getElementCenter(floatBall);
});
// 获取棍的中心点位置
function getElementCenter(element) {
const rect = element.getBoundingClientRect();
const centerX = rect.left + rect.width / 2;
const centerY = rect.top + rect.height / 2;
return { centerX, centerY }
}
function init() {
const steps = [];
const elements = [];
// 获取当前信息
function getNodes(element) {
const textNodes = [];
const imageNodes = [];
function traverse(node) {
hasBackgroundColor(node)
if (node.nodeType === Node.TEXT_NODE && node.nodeValue.trim() !== '') {
textNodes.push(node);
} else if (isImageNode(node)) {
imageNodes.push(node);
} else if (node.nodeType === Node.ELEMENT_NODE && !isExcludedNode(node)) {
for (const childNode of node.childNodes) {
traverse(childNode);
}
}
}
function isExcludedNode(node) {
const excludedTags = ['SCRIPT', 'STYLE', 'LINK', 'IFRAME', 'path'];
return excludedTags.includes(node.tagName);
}
// 校验元素是否有背景颜色
function hasBackgroundColor(node) {
try {
const computedStyle = window.getComputedStyle(node);
const backgroundColor = computedStyle.backgroundColor;
if (backgroundColor !== 'rgba(0, 0, 0, 0)' && backgroundColor !== 'transparent') {
node.style.backgroundColor = 'rgba(255, 255, 255, 1)'
}
} catch (e) {
}
}
traverse(element);
return { textNodes, imageNodes };
}
// 添加步骤到执行队列
function addStep(func, node) {
steps.push(func.bind(this));
elements.push(node);
}
// 开始步骤
function startStep() {
const interTimer = setInterval(() => {
if (steps.length > 0) {
const func = steps.shift();
const element = elements.shift();
if (func) {
func();
if (element) {
const rect = element.getBoundingClientRect();
element.style.top = `${rect.top}px`;
element.style.left = `${rect.left}px`;
addStep(() => {
element.classList.add('inhaleAnimation');
element.style.top = `${center.centerY}px`;
element.style.left = `${center.centerX}px`;
element.addEventListener('animationend', function () {
element.remove();
});
})
}
}
} else {
clearInterval(interTimer);
}
}, timer)
}
const { textNodes, imageNodes } = getNodes(targetNodeObject);
// 处理文字
function textFn(node) {
const textContent = node.nodeValue.trim();
const newSpan = document.createElement('span');
const newContent = Array.from(textContent).map(char => {
const charSpan = document.createElement('span');
charSpan.textContent = char;
addStep(() => {
charSpan.classList.add("highlighted-text");
}, charSpan);
newSpan.appendChild(charSpan);
return charSpan.outerHTML;
}).join('');
node.parentNode.replaceChild(newSpan, node);
};
// 处理图片
function imageFn(node) {
const charSpan = document.createElement('span');
node.classList.add("highlighted-image");
addStep(() => {
const rect = node.getBoundingClientRect();
charSpan.style.width = `${node.width || node.clientWidth || rect.width}px`;
charSpan.style.height = `${node.height || node.clientHeight || rect.width}px`;
charSpan.classList.add("highlighted-image");
node.replaceWith(charSpan);
addStep(() => {
charSpan.style.width = "4px";
//charSpan.style.transform = `scale(1) rotate(${30}deg)`
}, charSpan);
});
}
textNodes.forEach(node => {
if (node.nodeValue.indexOf('@font-face') !== -1) { return; }
textFn(node);
});
imageNodes.forEach(node => {
imageFn(node);
});
// 判断是否为图片
function isImageNode(node) {
if (node.tagName === 'BODY') { return; }
const imageTags = ['IMG', 'IMAGE', 'VIDEO', 'svg', "FORM", "svg"];
return imageTags.includes(node.tagName) &&
!(node.tagName === 'BODY' && node.classList.contains('floating'));
}
startStep();
}
</script>
效果为：
效果好像还不错！
现在，将上面JS代码压缩
通过在url输入框内，输入Javascrip:【上面压缩的代码】
将代码放入juejin某页，一起look下效果(截取一段)：
看到这里的朋友也知道，这个也就一个前端佬的自嗨了。
但还是想说....
原文链接：https://juejin.cn/post/7416664040401600539
作者：大怪v
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