<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>简单进度条演示</title>
<style>
body {
font-family: Arial, sans-serif;
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
height: 100vh;
margin: 0;
background-color: #f5f5f5;
}
.progress-container {
width: 80%;
max-width: 500px;
background-color: #e0e0e0;
border-radius: 10px;
overflow: hidden;
margin-bottom: 20px;
}
.progress-bar {
height: 30px;
background-color: #4CAF50;
width: 0%;
transition: width 0.3s ease;
text-align: center;
line-height: 30px;
color: white;
}
.controls {
display: flex;
gap: 10px;
margin-bottom: 20px;
}
button {
padding: 8px 16px;
background-color: #4CAF50;
color: white;
border: none;
border-radius: 4px;
cursor: pointer;
}
button:hover {
background-color: #45a049;
}
.info {
margin-top: 20px;
color: #666;
font-size: 14px;
}
</style>
</head>
<body>
<h1>简单进度条演示</h1>
<div class="progress-container">
<div id="progress" class="progress-bar">0%</div>
</div>
<div class="controls">
<button id="startBtn">开始</button>
<button id="resetBtn">重置</button>
</div>
<div class="info">
</div>
<script>
const progressBar = document.getElementById('progress');
const startBtn = document.getElementById('startBtn');
const resetBtn = document.getElementById('resetBtn');
let progress = 0;
let interval;
function updateProgressBar() {
progressBar.style.width = progress + '%';
progressBar.textContent = progress + '%';
}
startBtn.addEventListener('click', function() {
if (interval) clearInterval(interval);
interval = setInterval(function() {
if (progress >= 100) {
clearInterval(interval);
return;
}
progress += 1;
updateProgressBar();
}, 50);
});
resetBtn.addEventListener('click', function() {
clearInterval(interval);
progress = 0;
updateProgressBar();
});
// 初始化
updateProgressBar();
</script>
</body>
</html>
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