当前位置：文江博客知识库 en-US 文档 Web API SVGPreserveAspectRatio

SVGPreserveAspectRatio - Web APIs 编辑

SVG preserveAspectRatio interface

The SVGPreserveAspectRatio interface corresponds to the preserveAspectRatio attribute, which is available for some of SVG's elements.

An SVGPreserveAspectRatio object can be designated as read only, which means that attempts to modify the object will result in an exception being thrown.

Interface overview

Also implement	None
Methods	None
Properties	unsigned short `align` unsigned short `meetOrSlice`
Constants	`SVG_PRESERVEASPECTRATIO_UNKNOWN` = 0 `SVG_PRESERVEASPECTRATIO_NONE` = 1 `SVG_PRESERVEASPECTRATIO_XMINYMIN` = 2 `SVG_PRESERVEASPECTRATIO_XMIDYMIN` = 3 `SVG_PRESERVEASPECTRATIO_XMAXYMIN` = 4 `SVG_PRESERVEASPECTRATIO_XMINYMID` = 5 `SVG_PRESERVEASPECTRATIO_XMIDYMID` = 6 `SVG_PRESERVEASPECTRATIO_XMAXYMID` = 7 `SVG_PRESERVEASPECTRATIO_XMINYMAX` = 8 `SVG_PRESERVEASPECTRATIO_XMIDYMAX` = 9 `SVG_PRESERVEASPECTRATIO_XMAXYMAX` = 10 `SVG_MEETORSLICE_UNKNOWN` = 0 `SVG_MEETORSLICE_MEET` = 1 `SVG_MEETORSLICE_SLICE` = 2
Normative document	SVG 1.1 (2nd Edition)

Constants

Name	Value	Description
`SVG_PRESERVEASPECTRATIO_UNKNOWN`	0	The enumeration was set to a value that is not one of predefined types. It is invalid to attempt to define a new value of this type or to attempt to switch an existing value to this type.
`SVG_PRESERVEASPECTRATIO_NONE`	1	Corresponds to value `none` for attribute `preserveAspectRatio`.
`SVG_PRESERVEASPECTRATIO_XMINYMIN`	2	Corresponds to value `xMinYMin` for attribute `preserveAspectRatio`.
`SVG_PRESERVEASPECTRATIO_XMIDYMIN`	3	Corresponds to value `xMidYMin` for attribute `preserveAspectRatio`.
`SVG_PRESERVEASPECTRATIO_XMAXYMIN`	4	Corresponds to value `xMaxYMin` for attribute `preserveAspectRatio`.
`SVG_PRESERVEASPECTRATIO_XMINYMID`	5	Corresponds to value `xMinYMid` for attribute `preserveAspectRatio`.
`SVG_PRESERVEASPECTRATIO_XMIDYMID`	6	Corresponds to value `xMidYMid` for attribute `preserveAspectRatio`.
`SVG_PRESERVEASPECTRATIO_XMAXYMID`	7	Corresponds to value `xMaxYMid` for attribute `preserveAspectRatio`.
`SVG_PRESERVEASPECTRATIO_XMINYMAX`	8	Corresponds to value `xMinYMax` for attribute `preserveAspectRatio`.
`SVG_PRESERVEASPECTRATIO_XMIDYMAX`	9	Corresponds to value `xMidYMax` for attribute `preserveAspectRatio`.
`SVG_PRESERVEASPECTRATIO_XMAXYMAX`	10	Corresponds to value `xMaxYMax` for attribute `preserveAspectRatio`.
`SVG_MEETORSLICE_UNKNOWN`	0	The enumeration was set to a value that is not one of predefined types. It is invalid to attempt to define a new value of this type or to attempt to switch an existing value to this type.
`SVG_MEETORSLICE_MEET`	1	Corresponds to value `meet` for attribute `preserveAspectRatio`.
`SVG_MEETORSLICE_SLICE`	2	Corresponds to value `slice` for attribute `preserveAspectRatio`.

Properties

Name	Type	Description
`align`	unsigned short	The type of the alignment value as specified by one of the SVG_PRESERVEASPECTRATIO_* constants defined on this interface.
`meetOrSlice`	unsigned short	The type of the meet-or-slice value as specified by one of the SVG_MEETORSLICE_* constants defined on this interface.

Exceptions on setting: a /wiki/en-US/docs/Web/API/DOMException with code NO_MODIFICATION_ALLOWED_ERR is raised on an attempt to change the value of an attribute on a read only object.