问题：
When should certain image file types be used when building websites or interfaces, etc? 在构建网站或界面等时应该何时使用某些图像文件类型？
What are their points of strength and weakness? 他们的优点和缺点是什么？
I know that PNG & GIF are lossless, while JPEG is lossy. 我知道PNG和GIF是无损的，而JPEG是有损的。
But what is the main difference between PNG & GIF? 但是PNG和GIF之间的主要区别是什么？
Why should I prefer one over the other? 为什么我更喜欢一个呢？ What is SVG and when should I use it? 什么是SVG以及何时使用它？
If you don't care about each and every pixel, should you always use JPEG since it's the "lightest" one? 如果你不关心每个像素，你应该总是使用JPEG，因为它是“最轻”的吗？
解决方案：
参考一： https://stackoom.com/question/9npq/PNG与GIF与JPEG与SVG的不同用途有哪些参考二： https://oldbug.net/q/9npq/What-are-the-different-usecases-of-PNG-vs-GIF-vs-JPEG-vs-SVG
来源：oschina
链接：https://my.oschina.net/u/4438370/blog/4281679