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imageviewerv2

v0.0.1

Published

```markdown 功能说明 这个精简版保留了核心的缩放功能:

Readme

图片预览器 api 接口文档

功能说明

功能说明
这个精简版保留了核心的缩放功能:

鼠标滚轮缩放:
向上滚动鼠标滚轮放大图片
向下滚动鼠标滚轮缩小图片
缩放时保持鼠标位置不变的视觉效果
初始化居中:
图片加载后自动居中显示
支持 fit(适应容器)和 fill(填充容器)两种初始缩放模式
响应式调整:
窗口大小变化时自动重新计算并调整图片位置
API 接口:
loadImage(url):加载新图片
zoomIn():放大图片
zoomOut():缩小图片
getState():获取当前状态
destroy():销毁预览器

示例

<!DOCTYPE html>
<html lang="zh-CN">
	<head>
		<meta charset="UTF-8" />
		<meta name="viewport" content="width=device-width, initial-scale=1.0" />
		<title>图片预览器示例</title>
		<style>
			.viewer-container {
				width: 800px;
				height: 600px;
				border: 1px solid #ccc;
				margin: 20px auto;
			}
		</style>
	</head>

	<body>
		<div class="viewer-container" id="myViewer"></div>

		<script src="imageViewer.js"></script>
		<script>
			// 初始化预览器
			const viewer = new ImageViewer('myViewer', {
				// imageUrl: 'https://picsum.photos/1200/800',
				imageUrl: './images/1.jpg',
				initialScale: 'fit', // 初始缩放模式:fit(适应)、fill(填充)或具体数值
				minScale: 0.5,
				maxScale: 5,
				zoomStep: 0.1,
				onLoad: (image) => {
					console.log('图片加载完成:', image);
				},
				onChange: (state) => {
					console.log('视图状态变化:', state);
				}
			});

			setTimeout(() => {
				// 可选:动态加载新图片
				viewer.loadImage('./images/2.jpg');
			}, 3000);

			// viewer.loadImage('https://example.com/another-image.jpg');
		</script>
	</body>
</html>