ellipse
Baseline
Widely available
*
This feature is well established and works across many devices and browser versions. It’s been available across browsers since 2015年7月.
* Some parts of this feature may have varying levels of support.
ellipse元素是一个 SVG 基本形状，用来创建一个椭圆，基于一个中心坐标以及它们的x半径和y半径。
椭圆不能指定精确的椭圆倾向（假设，举个例子，你想画一个 45 度角倾斜的椭圆），但是可以利用transform属性实现旋转。