批改状态:合格
老师批语:完成的很好, 效果很棒, 继续加油

<!DOCTYPE html><html lang="zh-CN"><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>CSS美化留言板</title><style>* {margin: 0;padding: 0;box-sizing: border-box;}body {background-color: lightblue;max-height: 1120em;max-width: 1170px;margin: 0 auto;padding: 0 30px;}h3 {margin: 20px 10px;text-align: center;}input {display: block;width: 100%;min-height: 200px;margin-bottom: 20px;padding: 5px 10px 250px;}.list > li {display: flex;place-content: space-between;background-color: lightcoral;line-height: 36px;margin-bottom: 5px;border-radius: 3px;padding: 0 10px;}.list > li > button {border-radius: 5px;margin: 5px 0;border: 1px;width: 40px;}</style></head><body><h3>留言板</h3><input type="text" onkeydown="insertComment(this)" placeholder="请输入您的留言" autofocus/><ul class="list"></ul></body><script>const insertComment = function (ele) {if (event.key === 'Enter') {// 1. 非空判断 event指事件对象if (ele.value.length === 0) {alert('留言不能为空')// 重置焦点ele.focus();// 直接返回return false;}// 2. 添加留言const ul = document.querySelector('.list');ele.value += `<button onclick="del(this.parentNode)">删除</button>`;ul.insertAdjacentHTML('afterbegin', `<li>${ele.value}</li>`);// 3. 清空输入框ele.value = null;}};// 删除const del = function(ele) {return confirm('是否删除?') ? (ele.outerHTML = null) : false;};</script></html>
Copyright 2014-2025 https://www.php.cn/ All Rights Reserved | php.cn | 湘ICP备2023035733号