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790 lines (709 loc) · 24 KB
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// 示例代码库
const examples = {
1: `<!DOCTYPE html>
<html>
<head>
<title>标题和段落示例</title>
<style>
body {
font-family: Arial, sans-serif;
max-width: 800px;
margin: 0 auto;
padding: 20px;
background: #f0f8ff;
}
h1 { color: #2c5aa0; }
h2 { color: #4a7bc8; }
h3 { color: #6a8fd8; }
p { line-height: 1.6; }
</style>
</head>
<body>
<h1>这是一个一级标题</h1>
<h2>这是一个二级标题</h2>
<h3>这是一个三级标题</h3>
<p>这是一个段落。HTML中的段落用于显示文本内容，可以包含多行文字。</p>
<p>这是另一个段落。每个段落都会自动换行并有一定的间距。</p>
</body>
</html>`,
2: `<!DOCTYPE html>
<html>
<head>
<title>图片和链接示例</title>
<style>
body {
font-family: Arial, sans-serif;
max-width: 800px;
margin: 0 auto;
padding: 20px;
background: #fff0f5;
}
.container {
text-align: center;
}
img {
max-width: 100%;
height: auto;
border-radius: 10px;
margin: 20px 0;
}
a {
color: #e91e63;
text-decoration: none;
font-weight: bold;
}
a:hover {
text-decoration: underline;
}
</style>
</head>
<body>
<div class="container">
<h1>图片和链接演示</h1>
<img src="https://picsum.photos/400/300?random=1" alt="示例风景图片">
<p>点击下面的链接访问学习资源：</p>
<a href="https://developer.mozilla.org/zh-CN/docs/Web/HTML" target="_blank">MDN HTML文档</a>
<br>
<a href="https://www.w3schools.com/html/" target="_blank">W3Schools HTML教程</a>
</div>
</body>
</html>`,
3: `<!DOCTYPE html>
<html>
<head>
<title>表格示例</title>
<style>
body {
font-family: Arial, sans-serif;
max-width: 800px;
margin: 0 auto;
padding: 20px;
background: #f0fff0;
}
table {
width: 100%;
border-collapse: collapse;
margin: 20px 0;
}
th, td {
border: 1px solid #ddd;
padding: 12px;
text-align: left;
}
th {
background-color: #4CAF50;
color: white;
}
tr:nth-child(even) {
background-color: #f2f2f2;
}
</style>
</head>
<body>
<h1>HTML表格示例</h1>
<table>
<thead>
<tr>
<th>姓名</th>
<th>年龄</th>
<th>城市</th>
<th>职业</th>
</tr>
</thead>
<tbody>
<tr>
<td>张三</td>
<td>25</td>
<td>北京</td>
<td>前端开发</td>
</tr>
<tr>
<td>李四</td>
<td>30</td>
<td>上海</td>
<td>UI设计师</td>
</tr>
<tr>
<td>王五</td>
<td>28</td>
<td>深圳</td>
<td>全栈开发</td>
</tr>
</tbody>
</table>
</body>
</html>`,
4: `<!DOCTYPE html>
<html>
<head>
<title>列表示例</title>
<style>
body {
font-family: Arial, sans-serif;
max-width: 800px;
margin: 0 auto;
padding: 20px;
background: #fffaf0;
}
.list-container {
display: flex;
justify-content: space-around;
flex-wrap: wrap;
}
.list-box {
background: white;
padding: 20px;
margin: 10px;
border-radius: 8px;
box-shadow: 0 2px 4px rgba(0,0,0,0.1);
flex: 1;
min-width: 300px;
}
ul { list-style-type: disc; }
ol { list-style-type: decimal; }
li { margin: 5px 0; }
</style>
</head>
<body>
<h1>HTML列表示例</h1>
<div class="list-container">
<div class="list-box">
<h3>无序列表</h3>
<ul>
<li>HTML基础</li>
<li>CSS样式</li>
<li>JavaScript交互</li>
<li>响应式设计</li>
</ul>
</div>
<div class="list-box">
<h3>有序列表</h3>
<ol>
<li>学习HTML标签</li>
<li>掌握CSS选择器</li>
<li>理解JavaScript语法</li>
<li>构建完整项目</li>
</ol>
</div>
</div>
</body>
</html>`,
5: `<!DOCTYPE html>
<html>
<head>
<title>文字样式示例</title>
<style>
body {
font-family: Arial, sans-serif;
max-width: 800px;
margin: 0 auto;
padding: 20px;
background: #f8f8ff;
}
.text-sample {
margin: 15px 0;
padding: 10px;
border-left: 4px solid #6a5acd;
background: white;
}
.bold { font-weight: bold; color: #d35400; }
.italic { font-style: italic; color: #2980b9; }
.underline { text-decoration: underline; color: #27ae60; }
.highlight {
background-color: #fffacd;
padding: 2px 4px;
}
</style>
</head>
<body>
<h1>HTML文字样式示例</h1>
<div class="text-sample">
<p>这是<span class="bold">加粗</span>的文字效果</p>
<p>这是<span class="italic">斜体</span>的文字效果</p>
<p>这是<span class="underline">下划线</span>的文字效果</p>
<p>这是<span class="highlight">高亮</span>的文字效果</p>
<p>可以<span class="bold italic">同时使用</span>多种样式</p>
</div>
</body>
</html>`,
6: `<!DOCTYPE html>
<html>
<head>
<title>CSS样式示例</title>
<style>
body {
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
max-width: 800px;
margin: 0 auto;
padding: 20px;
background: linear-gradient(135deg, #667eea, #764ba2);
color: white;
}
.card {
background: rgba(255,255,255,0.1);
padding: 25px;
margin: 15px 0;
border-radius: 15px;
backdrop-filter: blur(10px);
border: 1px solid rgba(255,255,255,0.2);
}
.gradient-text {
background: linear-gradient(45deg, #ff6b6b, #feca57);
-webkit-background-clip: text;
-webkit-text-fill-color: transparent;
font-weight: bold;
}
.button {
background: linear-gradient(45deg, #ff6b6b, #feca57);
border: none;
padding: 12px 24px;
border-radius: 25px;
color: white;
font-weight: bold;
cursor: pointer;
transition: transform 0.2s;
}
.button:hover {
transform: translateY(-2px);
}
</style>
</head>
<body>
<div class="card">
<h1 class="gradient-text">CSS样式演示</h1>
<p>这个示例展示了现代CSS特性：</p>
<ul>
<li>渐变背景</li>
<li>毛玻璃效果</li>
<li>动画过渡</li>
<li>响应式布局</li>
</ul>
<button class="button">悬停效果按钮</button>
</div>
</body>
</html>`
};
const defaultCode = `
<!DOCTYPE html>
<html>
<head>
<title>我的第一个网页</title>
<style>
body {
font-family: Arial, sans-serif;
max-width: 800px;
margin: 0 auto;
padding: 20px;
background: linear-gradient(135deg, #667eea, #764ba2);
color: white;
}
.container {
background: rgba(255,255,255,0.1);
padding: 30px;
border-radius: 15px;
backdrop-filter: blur(10px);
}
h1 {
text-align: center;
margin-bottom: 30px;
}
.card {
background: white;
color: #333;
padding: 20px;
margin: 10px 0;
border-radius: 10px;
box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}
</style>
</head>
<body>
<div class="container">
<h1>欢迎学习HTML!</h1>
<div class="card">
<h2>HTML是什么?</h2>
<p>HTML是网页的基础构建语言，用于创建网页结构。</p>
</div>
<div class="card">
<h2>开始学习</h2>
<p>修改左侧代码，然后点击运行按钮查看效果!</p>
</div>
<div class="card">
<h2>参考示例</h2>
<p>点击导航栏学习示例参考学习!</p>
</div>
</div>
</body>
</html>`;
const theme_selector = document.getElementById('theme-selector');
// 主题切换功能
function setTheme(theme) {
document.body.className = document.body.className.replace(/theme-\w+/g, '');
document.body.classList.add(`theme-${theme}`);
localStorage.setItem('editorTheme', theme);
theme_selector.value = theme;
// 更新语法高亮
updateCodeDisplay();
}
// 主题选择器事件
theme_selector.addEventListener('change', function() {
setTheme(this.value);
});
const codeInput = document.getElementById('html-code');
const highlightOutput = document.getElementById('highlightOutput');
const charCount = document.getElementById('charCount');
const lineCount = document.getElementById('lineCount');
codeInput.addEventListener('input', updateHighlight);
codeInput.addEventListener('scroll', syncScroll);
codeInput.addEventListener('keydown', handleTab);
function syncScroll() {
highlightOutput.scrollTop = codeInput.scrollTop;
highlightOutput.scrollLeft = codeInput.scrollLeft;
}
function updateHighlight() {
var theme = 'theme-' + theme_selector.value;
const code = codeInput.value;
// 更新字符和行数统计
charCount.textContent = `字符数: ${code.length}`;
lineCount.textContent = `行数: ${code.split('\n').length}`;
try {
// 语法高亮处理
let highlighted = code
.replace(/&/g, '&')
.replace(/</g, '<')
.replace(/>/g, '>')
.replace(/\n/g, '<br>')
.replace(/\t/g, ' ')
.replace(/ /g, ' ');
// 处理DOCTYPE声明
highlighted = highlighted.replace(
/<!DOCTYPE\s+([^&]*)>/gi,
'<<span class="doctype">!DOCTYPE $1</span>>'
);
// 处理HTML标签
highlighted = highlighted.replace(
/<(\/?)([a-zA-Z][a-zA-Z0-9-]*)(\s[^&]*?)?>/g,
function(match, slash, tagName, attributes) {
let result = `<<span class="html-tag">${slash}${tagName}</span>`;
if (attributes) {
// 处理属性
let attrText = attributes.replace(
/(\s)([a-zA-Z-][a-zA-Z0-9-:]*)=("([^"]*)"|'([^']*)'|([a-zA-Z0-9-]+))/g,
function(attrMatch, space, attrName, quote1, doubleValue, quote2, singleValue, unquotedValue) {
let value = doubleValue || singleValue || unquotedValue;
return `${space}<span class="html-attr">${attrName}</span>=<span class="html-value">"${value}"</span>`;
}
);
result += attrText;
}
result += '>';
return result;
}
);
// 处理HTML注释
highlighted = highlighted.replace(
/<!--([\s\S]*?)-->/g,
'<!--<span class="' + theme + ' html-comment">$1</span>-->'
);
// 处理CSS注释
highlighted = highlighted.replace(
/\/\*([\s\S]*?)\*\//g,
'<span class="' + theme + 'css-comment">/*$1*/</span>'
);
//highlighted = '<div class="' + theme + '"> ' + highlighted + '</div>';
highlightOutput.innerHTML = highlighted;
} catch (error) {
console.error('代码高亮错误:', error);
// 显示原始代码作为后备
highlightOutput.textContent = codeInput.value;
}
}
function handleTab(e) {
if (e.key === 'Tab') {
e.preventDefault();
const start = codeInput.selectionStart;
const end = codeInput.selectionEnd;
// 插入4个空格
codeInput.value = codeInput.value.substring(0, start) + ' ' + codeInput.value.substring(end);
// 设置光标位置
codeInput.selectionStart = codeInput.selectionEnd = start + 4;
updateHighlight();
}
}
function clearCode() {
codeInput.value = '';
updateHighlight();
}
// 添加拖拽调整功能
document.addEventListener('DOMContentLoaded', function() {
const resizer = document.getElementById('resizer');
const editorPanel = document.getElementById('editor-panel');
const previewPanel = document.getElementById('preview-panel');
const container = document.querySelector('.editor-container');
// 初始化编辑器高度
const codeEditor = document.getElementById('html-code');
codeEditor.style.height = 'auto';
codeEditor.style.height = (codeEditor.scrollHeight) + 'px';
// 运行初始代码
runCode();
setupEventListeners();
updateHighlight();
// 拖拽功能实现
let startX, startY, startWidth, startHeight;
function initDrag(e) {
startX = e.pageX;
startY = e.pageY;
startWidth = editorPanel.offsetWidth;
startHeight = editorPanel.offsetHeight;
document.addEventListener('mousemove', resize);
document.addEventListener('mouseup', stopResize);
document.addEventListener('touchmove', resize);
document.addEventListener('touchend', stopResize);
resizer.style.userSelect = 'none';
resizer.style.touchAction = 'none';
}
function resize(e) {
e.preventDefault();
if (window.innerWidth > 768) { // 桌面模式 - 水平拖拽
const width = startWidth + (e.pageX - startX);
// 限制最小宽度
if (width >= 300 && width <= container.offsetWidth - 300) {
editorPanel.style.width = width + 'px';
previewPanel.style.width = (container.offsetWidth - width - 8) + 'px';
}
} else { // 移动模式 - 垂直拖拽
const height = startHeight + (e.pageY - startY);
// 限制最小高度
if (height >= 200 && height <= container.offsetHeight - 200) {
editorPanel.style.height = height + 'px';
previewPanel.style.height = (container.offsetHeight - height - 8) + 'px';
}
}
}
function stopResize() {
document.removeEventListener('mousemove', resize);
document.removeEventListener('mouseup', stopResize);
document.removeEventListener('touchmove', resize);
document.removeEventListener('touchend', stopResize);
}
resizer.addEventListener('mousedown', initDrag);
resizer.addEventListener('touchstart', initDrag);
});
// 预览全屏功能
function openPreviewFullscreen() {
const modal = document.getElementById('previewModal');
const fullscreenFrame = document.getElementById('fullscreenPreview');
const modalTitle = document.getElementById('modalTitle');
const code = document.getElementById('html-code').value;
// 提取页面标题
const titleMatch = code.match(/<title>(.*?)<\/title>/i);
modalTitle.textContent = titleMatch ? titleMatch[1] : '网页预览';
// 设置iframe内容
fullscreenFrame.srcdoc = code;
// 显示模态框
modal.style.display = 'flex';
}
function closePreviewFullscreen() {
const modal = document.getElementById('previewModal');
modal.style.display = 'none';
}
// 点击模态框背景关闭
document.getElementById('previewModal').addEventListener('click', function(e) {
if (e.target === this) {
closePreviewFullscreen();
}
});
// 编辑区全屏功能
function toggleEditorFullscreen() {
const element = document.getElementById('editor-panel');
const isFullscreen = element.classList.contains('fullscreen');
updateHighlight();
if (isFullscreen) {
// 退出全屏
if (document.exitFullscreen) {
document.exitFullscreen();
} else if (document.webkitExitFullscreen) {
document.webkitExitFullscreen();
} else if (document.msExitFullscreen) {
document.msExitFullscreen();
}
element.classList.remove('fullscreen');
// 恢复按钮
const closeBtn = document.getElementById('editor-fullscreen-close');
if (closeBtn) closeBtn.remove();
} else {
// 进入全屏
if (element.requestFullscreen) {
element.requestFullscreen();
} else if (element.webkitRequestFullscreen) {
element.webkitRequestFullscreen();
} else if (element.msRequestFullscreen) {
element.msRequestFullscreen();
}
element.classList.add('fullscreen');
}
}
// 下载代码功能
function downloadCode() {
const code = document.getElementById('html-code').value;
const blob = new Blob([code], { type: 'text/html' });
const url = URL.createObjectURL(blob);
const a = document.createElement('a');
a.href = url;
a.download = 'my-html-page.html';
document.body.appendChild(a);
a.click();
// 清理
setTimeout(() => {
document.body.removeChild(a);
URL.revokeObjectURL(url);
}, 0);
showMessage('代码已下载', 'success');
}
// 页面加载时初始化
document.addEventListener('DOMContentLoaded', function() {
runCode(); // 初始运行示例代码
setupEventListeners();
updateHighlight();
});
// 添加代码格式化功能
function formatCode() {
const codeEditor = document.getElementById('html-code');
try {
// HTML格式化处理
let formatted = '';
let indent = 0;
const lines = codeEditor.value.split('\n');
lines.forEach(line => {
const trimmed = line.trim();
if (trimmed.startsWith('</')) indent = Math.max(0, indent - 4);
formatted += ' '.repeat(indent) + trimmed + '\n';
if (trimmed.startsWith('<') && !trimmed.startsWith('</') && !trimmed.endsWith('/>')) {
indent += 4;
}
});
codeEditor.value = formatted;
codeEditor.style.height = 'auto';
codeEditor.style.height = (codeEditor.scrollHeight) + 'px';
showMessage('代码已格式化', 'success');
} catch (error) {
showMessage('格式化失败: ' + error.message, 'error');
}
}
// 设置事件监听器
function setupEventListeners() {
const codeEditor = document.getElementById('html-code');
// 代码编辑器自动调整高度 + 自动保存
codeEditor.addEventListener('input', function() {
this.style.height = 'auto';
this.style.height = (this.scrollHeight) + 'px';
// 防抖处理：1秒内无输入才保存
clearTimeout(this.saveTimer);
this.saveTimer = setTimeout(() => {
localStorage.setItem('htmlLearningCode', this.value);
showMessage('代码已自动保存', 'info');
}, 1000);
});
// 快捷键支持
document.addEventListener('keydown', function(e) {
if (e.ctrlKey && e.key === 'Enter') {
runCode();
e.preventDefault(); // 防止默认行为
}
});
}
// 显示指定区域
function showSection(section) {
// 隐藏所有区域
document.getElementById('editor-section').classList.add('hidden');
document.getElementById('examples-section').classList.add('hidden');
document.getElementById('resources-section').classList.add('hidden');
// 显示目标区域
const targetSection = document.getElementById(section + '-section');
targetSection.classList.remove('hidden');
targetSection.classList.add('fade-in');
}
// 运行代码
function runCode() {
const code = document.getElementById('html-code').value;
const preview = document.getElementById('preview');
try {
// 清空预览区域
preview.innerHTML = '';
// 创建iframe来安全运行代码
const iframe = document.createElement('iframe');
iframe.style.width = '100%';
iframe.style.height = '100%';
iframe.style.border = 'none';
iframe.onload = function() {
// 增加对文档对象的检查
const iframeWindow = iframe.contentWindow;
if (!iframeWindow) {
throw new Error("无法访问iframe窗口");
}
const iframeDoc = iframeWindow.document;
if (!iframeDoc) {
throw new Error("无法访问iframe文档");
}
iframeDoc.open();
iframeDoc.write(code);
iframeDoc.close();
};
// 先将iframe添加到DOM再加载内容
preview.appendChild(iframe);
// 保存代码到本地存储
localStorage.setItem('htmlLearningCode', code);
// 显示成功消息
showMessage('代码运行成功!', 'success');
} catch (error) {
showMessage('运行出错: ' + error.message, 'error');
}
}
// 重置代码
function resetCode() {
codeInput.value = defaultCode;
runCode();
updateHighlight();
showMessage('代码已重置为默认示例', 'info');
}
// 加载示例代码
function loadExample(exampleId) {
if (examples[exampleId]) {
document.getElementById('html-code').value = examples[exampleId];
runCode();
updateHighlight();
showSection('editor');
showMessage('示例代码已加载，点击运行查看效果', 'info');
}
}
// 显示消息提示
function showMessage(message, type) {
// 移除现有消息
const existingMessage = document.querySelector('.message-toast');
if (existingMessage) {
existingMessage.remove();
}
// 创建新消息
const messageDiv = document.createElement('div');
messageDiv.className = `message-toast fixed top-4 right-4 p-4 rounded-lg shadow-lg z-50 transition transform duration-300 ${
type === 'success' ? 'bg-green-500' :
type === 'error' ? 'bg-red-500' : 'bg-blue-500'
} text-white`;
messageDiv.textContent = message;
document.body.appendChild(messageDiv);
// 3秒后自动消失
setTimeout(() => {
messageDiv.style.transform = 'translateX(100%)';
setTimeout(() => messageDiv.remove(), 300);
}, 3000);
}
// 从本地存储加载代码
function loadFromStorage() {
const savedCode = localStorage.getItem('htmlLearningCode');
if (savedCode) {
document.getElementById('html-code').value = savedCode;
}
}
// 初始化本地存储功能
loadFromStorage();
updateHighlight();