标签：8 8 无损压缩 1.9 alt 在线工具 阿里 5.0 源文件 height
1、jpg:有损压缩格式
靠损失图片本身的质量来减小图片的体积，
适用于颜色丰富的图像;(像素点组成的，像素点越多会越清晰 )
2、gif：无损压缩格式
靠损失图片的色彩数量来减小图片的体积，支持透明，支持动画，
适用于颜色数量较少的图像;
3、png:无损压缩格式
损失图片的色彩数量来减小图片的体积，支持透明，不支持动画，是fireworks的 源文件格式，
适用于颜色数量较少的图像;
4、svg:可缩放矢量图形
svg 图像在放大或改变尺寸的情况下其图形质量不会有所损失，使用 XML 格式定义图形
与其他图像格式相比，使用 svg的优势在于：
当然我们可以将svg代码打包到 js 文件中，以减少http的请求次数
svg格式的图片可以通过阿里的 iconfont 图标库进行生成，或者使用在线工具将其他格式转svg格式。
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上面就是一个svg代码，可以通过width/height改变图片的大小，fill来改变图片的颜色，如下图为 宽200px，高200px的汉堡
标签：8 8 无损压缩 1.9 alt 在线工具 阿里 5.0 源文件 height
原文地址：https://www.cnblogs.com/wertantan/p/10134477.html
