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| <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0" /> <title>Flip 动画实现</title> <style> body { font-family: -apple-system, "Helvetica Neue", "Arial", "PingFang SC", "Hiragino Sans GB", "STHeiti", "Microsoft YaHei", "Microsoft JhengHei", "Source Han Sans SC", "Noto Sans CJK SC", "Source Han Sans CN", "Noto Sans SC", "Source Han Sans TC", "Noto Sans CJK TC", "WenQuanYi Micro Hei", SimSun, sans-serif; }
.container { width: 320px; height: 320px; background-color: blanchedalmond; }
.item { width: 80px; height: 80px; line-height: 80px; text-align: center; font-size: 30px; }
.item[data-key="1"], .item[data-key="6"], .item[data-key="11"], .item[data-key="14"] { background-color: tomato; color: #fff; }
.item[data-key="2"], .item[data-key="7"], .item[data-key="16"] { background-color: #999933; color: #fff; }
.item[data-key="3"], .item[data-key="10"], .item[data-key="12"] { background-color: #ff0033; color: #fff; }
.item[data-key="4"], .item[data-key="9"], .item[data-key="15"] { background-color: #003366; color: #fff; }
.item[data-key="8"], .item[data-key="13"] { background-color: #0099cc; color: #fff; }
.item[data-key="8"], .item[data-key="15"], .item[data-key="5"] { background-color: #996600; color: #fff; }
.grid-wrap { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; } </style> </head>
<body> <h1> 最新看来一个新东西(对我而言是新东西)Flip 动画,秉着好奇的心理,打开看了一眼,原来是这样的! </h1> <p></p> <hr /> <button id="change1">变化</button> <div class="container normal-wrap"> <div class="item" data-key="1">1</div> <div class="item" data-key="2">2</div> <div class="item" data-key="3">3</div> <div class="item" data-key="4">4</div> </div>
<hr /> <button id="change2">变化</button> <div class="container grid-wrap"> <div class="item" data-key="1">1</div> <div class="item" data-key="2">2</div> <div class="item" data-key="3">3</div> <div class="item" data-key="4">4</div> <div class="item" data-key="5">5</div> <div class="item" data-key="6">6</div> <div class="item" data-key="7">7</div> <div class="item" data-key="8">8</div> <div class="item" data-key="9">9</div> <div class="item" data-key="10">10</div> <div class="item" data-key="11">11</div> <div class="item" data-key="12">12</div> <div class="item" data-key="13">13</div> <div class="item" data-key="14">14</div> <div class="item" data-key="15">15</div> <div class="item" data-key="16">16</div> </div> </body> <script> const wrap = document.querySelector(".normal-wrap"); const btn = document.getElementById("change1");
const itemsCache = new Map();
btn.addEventListener("click", () => { raffle(); });
function delay(d = 1000) { const n = Date.now(); while (Date.now() - n < d) {} }
function calcPos(dom) { return dom.getBoundingClientRect(); }
function item(wrap, index) { if (!itemsCache[index]) { itemsCache[index] = wrap.querySelector(`.item[data-key="${index}"]`); } return itemsCache[index]; }
function itemV2(dom) { return (k) => { return dom.querySelector(`.item[data-key="${k}"]`); }; }
let index = [1, 2, 3, 4]; function raffle() { const posBegin = {}; const postLast = {};
index.forEach((k) => { posBegin[k] = calcPos(item(wrap, k)); });
index = index.sort(() => Math.random() - 0.5); index.forEach((k) => { wrap.append(item(wrap, k)); });
const diff = {}; index.forEach((k) => { postLast[k] = calcPos(item(wrap, k));
diff[k] = { x: postLast[k].left - posBegin[k].left, y: postLast[k].top - posBegin[k].top, }; });
Object.keys(diff).forEach((k) => { item(wrap, k).style.transform = `translate(${-diff[k].x}px, ${-diff[k] .y}px) scale(0.9)`; item(wrap, k).style.transition = "none"; });
window.requestAnimationFrame(() => { index.forEach((k) => { item(wrap, k).style.transform = `translate(0,0)`; item(wrap, k).style.transition = "transform .5s"; }); }); }
let index2 = Array.from({ length: 16 }) .fill(0) .map((v, i) => i + 1); const wrap2 = document.querySelector(".grid-wrap"); const btn2 = document.querySelector("#change2");
btn2.addEventListener("click", () => { raffle2(); });
function raffle2() { const _item = itemV2(wrap2); const posBegin = {}; const postLast = {};
index2.forEach((k) => { posBegin[k] = calcPos(_item(k)); });
index2 = index2.sort(() => Math.random() - 0.5); index2.forEach((k) => { wrap2.append(_item(k)); });
const diff = {}; index2.forEach((k) => { postLast[k] = calcPos(_item(k));
diff[k] = { x: postLast[k].left - posBegin[k].left, y: postLast[k].top - posBegin[k].top, }; });
Object.keys(diff).forEach((k) => { _item(k).style.transform = `translate(${-diff[k].x}px, ${-diff[k] .y}px) scale(0.9)`; _item(k).style.transition = "none"; });
window.requestAnimationFrame(() => { index2.forEach((k) => { _item(k).style.transform = `translate(0,0)`; _item(k).style.transition = "transform .5s"; }); });
console.log("a"); } </script> </html>
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