使用CSS按比例调整图像大小？ [重复] - Resize image proportionally with CSS? [duplicate]

问题：

This question already has an answer here: 这个问题在这里已有答案：

• How do I auto-resize an image to fit a 'div' container? 如何自动调整图像大小以适合“div”容器？ 31 answers 31个答案

Is there a way to resize (scale down) images proportionally using ONLY CSS? 有没有办法使用ONLY CSS按比例调整大小（缩小）图像？

I'm doing the JavaScript way, but just trying to see if this is possible with CSS. 我正在作JavaScript方式，但只是想看看CSS是否可行。

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解决方案：

参考一： https://stackoom.com/question/3Ix5/使用CSS按比例调整图像大小-重复
参考二： https://oldbug.net/q/3Ix5/Resize-image-proportionally-with-CSS-duplicate