y

该属性在用户坐标系统中标识了一个 y 轴坐标。本坐标的确切效果依赖于每个元素。大多数时候，它体现了引用元素的矩形区域的左上角的 y 轴坐标（请阅读每个元素的文档以了解例外情况）。

如果没有指定这个属性，效果相当于值被设置为0，除了<filter>元素以及<mask>元素；这两个元素的y默认值为-10%。

用法

类别	无
值	<coordinate>
可变性	Yes
规范文档	SVG 1.1 (2nd Edition): altGlyph element SVG 1.1 (2nd Edition): cursor element SVG 1.1 (2nd Edition): fePointLight element SVG 1.1 (2nd Edition): feSpotLight element SVG 1.1 (2nd Edition): filter element SVG 1.1 (2nd Edition): foreignObject element SVG 1.1 (2nd Edition): glyphRef element SVG 1.1 (2nd Edition): image element SVG 1.1 (2nd Edition): pattern element SVG 1.1 (2nd Edition): rect element SVG 1.1 (2nd Edition): svg element SVG 1.1 (2nd Edition): text element SVG 1.1 (2nd Edition): use element SVG 1.1 (2nd Edition): Filter primitive SVG 1.1 (2nd Edition): mask element SVG 1.1 (2nd Edition): tspan element

<coordinate>

A <coordinate> is a length in the user coordinate system that is the given distance from the origin of the user coordinate system along the relevant axis (the x-axis for X coordinates, the y-axis for Y coordinates). Its syntax is the same as that for <length>.

Within the SVG DOM, a <coordinate> is represented as an SVGLength or an SVGAnimatedLength.

元素

下列元素可以使用y属性：