要修复使用vanilla JavaScript编写的水平滚动脚本,首先需要了解脚本的具体问题和目标效果。以下是一些常见问题及其解决方案:
requestAnimationFrame
来优化动画效果。假设你有一个简单的水平滚动脚本,以下是一个可能的实现和修复示例:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Horizontal Scroll</title>
<style>
.scroll-container {
width: 100%;
overflow-x: auto;
white-space: nowrap;
}
.scroll-item {
display: inline-block;
width: 200px;
height: 200px;
background-color: lightblue;
margin-right: 10px;
}
</style>
</head>
<body>
<div class="scroll-container" id="scrollContainer">
<div class="scroll-item"></div>
<div class="scroll-item"></div>
<div class="scroll-item"></div>
<!-- More items -->
</div>
<button onclick="scrollLeft()">Scroll Left</button>
<button onclick="scrollRight()">Scroll Right</button>
<script>
function scrollLeft() {
var container = document.getElementById('scrollContainer');
container.scrollLeft -= 100;
}
function scrollRight() {
var container = document.getElementById('scrollContainer');
container.scrollLeft += 100;
}
</script>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Horizontal Scroll</title>
<style>
.scroll-container {
width: 100%;
overflow-x: auto;
white-space: nowrap;
}
.scroll-item {
display: inline-block;
width: 200px;
height: 200px;
background-color: lightblue;
margin-right: 10px;
}
</style>
</head>
<body>
<div class="scroll-container" id="scrollContainer">
<div class="scroll-item"></div>
<div class="scroll-item"></div>
<div class="scroll-item"></div>
<!-- More items -->
</div>
<button onclick="scrollLeft()">Scroll Left</button>
<button onclick="scrollRight()">Scroll Right</button>
<script>
function scrollLeft() {
smoothScroll(document.getElementById('scrollContainer'), -100);
}
function scrollRight() {
smoothScroll(document.getElementById('scrollContainer'), 100);
}
function smoothScroll(container, delta) {
const start = container.scrollLeft;
const change = delta;
const duration = 200; // milliseconds
let startTime = null;
function animateScroll(currentTime) {
if (!startTime) startTime = currentTime;
const timeElapsed = currentTime - startTime;
const run = ease(timeElapsed, start, change, duration);
container.scrollLeft = run;
if (timeElapsed < duration) requestAnimationFrame(animateScroll);
}
function ease(t, b, c, d) {
t /= d / 2;
if (t < 1) return c / 2 * t * t + b;
t--;
return -c / 2 * (t * (t - 2) - 1) + b;
}
requestAnimationFrame(animateScroll);
}
</script>
</body>
</html>
requestAnimationFrame
和缓动函数ease
实现平滑滚动效果。smoothScroll
函数中添加边界检查逻辑,确保滚动范围不超出容器边界。通过以上方法,你可以修复水平滚动脚本中的常见问题,并提升用户体验。
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