优化bug!DOCTYPE htmlhtmlhead title汉字检测器title meta charset=UTF-8 style 居中显示 body display flex; flex-direction column; align-items center; justify-content center; height 100vh; margin 0;
<p>优化后代码如下：</p>
<!DOCTYPE html>
<html>
<head>
<title>汉字检测器</title>
<meta charset="UTF-8">
<style>
/* 居中显示 */
body {
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
height: 100vh;
margin: 0;
background-color: #f7f7f7;
}
<pre><code>h1 {
font-size: 36px;
font-weight: bold;
margin-bottom: 20px;
}
.input-box {
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
width: 500px;
height: 300px;
padding: 20px;
background-color: #fff;
border-radius: 10px;
box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
}
.textarea {
width: 100%;
height: 200px;
padding: 10px;
font-size: 18px;
border: 1px solid #ccc;
border-radius: 5px;
resize: none;
margin-bottom: 20px;
}
.btn-wrap {
display: flex;
align-items: center;
justify-content: center;
}
.btn {
padding: 10px 20px;
border: none;
border-radius: 5px;
background-color: #007bff;
color: #fff;
font-size: 18px;
cursor: pointer;
margin: 0 10px;
}
.clear-btn {
background-color: #dc3545;
}
.output {
margin-top: 20px;
font-size: 18px;
font-weight: bold;
}
</code></pre>
</style>
</head>
<body>
<h1>汉字检测器</h1>
<div class="input-box">
<textarea class="textarea" placeholder="请输入需要检测的汉字"></textarea>
<div class="btn-wrap">
<button class="btn check-btn">检测</button>
<button class="btn clear-btn">清空</button>
</div>
</div>
<div class="output"></div>
<script>
const textarea = document.querySelector('.textarea');
const checkBtn = document.querySelector('.check-btn');
const clearBtn = document.querySelector('.clear-btn');
const output = document.querySelector('.output');
<pre><code>checkBtn.addEventListener('click', () => {
const content = textarea.value.trim();
const reg = /[\u4e00-\u9fa5]/g;
const result = (content.match(reg) || []).length;
output.innerText = `输入的文本中共包含 ${result} 个汉字`;
});
clearBtn.addEventListener('click', () => {
textarea.value = '';
output.innerText = '';
});
</code></pre>
</script>
</body>
</html>
<p>优化内容：</p>
<ol>
<li>将输出信息添加到页面中，而不是每次都创建新的元素节点。</li>
<li>给输出信息添加样式，使其更加清晰明了。</li>
<li>优化清空按钮的逻辑，使其清空输出信息。</li>
</ol>
原文地址: https://www.cveoy.top/t/topic/NlE 著作权归作者所有。请勿转载和采集!