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纯CSS实现自动滚动到底部

backend 2025/5/21 13:58:36

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<html lang="zh-CN"><head><meta charset="UTF-8" /><meta name="viewport" content="width=device-width, initial-scale=1.0" /><title>自动滚动到底部</title><style>* {box-sizing: border-box;}body {margin: 0;height: 100vh;display: flex;flex-direction: column;}.chater {flex: 1;overflow: auto;padding: 1em;display: flex;flex-direction: column-reverse;}.msger {flex: 1;display: flex;flex-direction: column;}.msger > pre {background-color: #eee;padding: 1em;border-radius: 8px;white-space: pre-wrap;}.msger .user {align-self: flex-end;margin-left: 10vw;}.msger .ai {align-self: flex-start;margin-right: 10vw;}.sender {flex-shrink: 0;padding: 1em;}</style></head><body><div class="chater"><div class="msger"></div></div><div class="sender"><input type="text" /><button onclick="send()">发送</button></div><script>function send() {document.querySelector('.chater').scrollTop = document.querySelector('.chater').scrollHeightconst pre = document.createElement('pre')pre.className = 'user'pre.textContent = document.querySelector('input').valuedocument.querySelector('.msger').appendChild(pre)const pre2 = document.createElement('pre')pre2.className = 'ai'const timer = setInterval(() => {pre2.textContent +=String.fromCharCode(Math.floor(Math.random() * 122) + 65).repeat(Math.ceil(Math.random() * 10)) + (Math.random() < 0.2 ? '\n' : ' ')if (pre2.textContent.length > 1000) clearInterval(timer)}, 50)document.querySelector('.msger').appendChild(pre2)}</script></body>
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