<marker> - SVG: Scalable Vector Graphics 编辑
The <marker>
element defines the graphic that is to be used for drawing arrowheads or polymarkers on a given <path>
, <line>
, <polyline>
or <polygon>
element.
Markers are attached to shapes using the marker-start
, marker-mid
, and marker-end
properties.
html,body,svg { height:100% }
<svg viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg">
<defs>
<!-- arrowhead marker definition -->
<marker id="arrow" viewBox="0 0 10 10" refX="5" refY="5"
markerWidth="6" markerHeight="6"
orient="auto-start-reverse">
<path d="M 0 0 L 10 5 L 0 10 z" />
</marker>
<!-- simple dot marker definition -->
<marker id="dot" viewBox="0 0 10 10" refX="5" refY="5"
markerWidth="5" markerHeight="5">
<circle cx="5" cy="5" r="5" fill="red" />
</marker>
</defs>
<!-- Coordinate axes with a arrowhead in both direction -->
<polyline points="10,10 10,90 90,90" fill="none" stroke="black"
marker-start="url(#arrow)" marker-end="url(#arrow)" />
<!-- Data line with polymarkers -->
<polyline points="15,80 29,50 43,60 57,30 71,40 85,15" fill="none" stroke="grey"
marker-start="url(#dot)" marker-mid="url(#dot)" marker-end="url(#dot)" />
</svg>
Attributes
markerHeight
- This attribute defines the height of the marker viewport.
Value type: <length> ; Default value:3
; Animatable: yes markerUnits
- This attribute defines the coordinate system for the attributes
markerWidth
,markerHeight
and the contents of the<marker>
.
Value type:userSpaceOnUse
|strokeWidth
; Default value:strokeWidth
; Animatable: yes markerWidth
- This attribute defines the width of the marker viewport.
Value type: <length> ; Default value:3
; Animatable: yes orient
- This attribute defines the orientation of the marker relative to the shape it is attached to.
Value type:auto
|auto-start-reverse
|<angle> ; Default value:0
; Animatable: yes preserveAspectRatio
- This attribute defines how the svg fragment must be deformed if it is embedded in a container with a different aspect ratio.
Value type: (none
|xMinYMin
|xMidYMin
|xMaxYMin
|xMinYMid
|xMidYMid
|xMaxYMid
|xMinYMax
|xMidYMax
|xMaxYMax
) (meet
|slice
)? ; Default value:xMidYMid meet
; Animatable: yes refX
- This attribute defines the x coordinate for the reference point of the marker.
Value type:left
|center
|right
|<coordinate> ; Default value:0
; Animatable: yes refY
- This attribute defines the y coordinate for the reference point of the marker.
Value type:top
|center
|bottom
|<coordinate> ; Default value:0
; Animatable: yes viewBox
- This attribute defines the bound of the SVG viewport for the current SVG fragment.
Value type: <list-of-numbers> ; Default value: none; Animatable: yes
Global attributes
- Core Attributes
- Most notably:
id
,tabindex
- Styling Attributes
class
,style
- Conditional Processing Attributes
- Most notably:
requiredExtensions
,systemLanguage
- Presentation Attributes
- Most notably:
clip-path
,clip-rule
,color
,color-interpolation
,color-rendering
,cursor
,display
,fill
,fill-opacity
,fill-rule
,filter
,mask
,opacity
,pointer-events
,shape-rendering
,stroke
,stroke-dasharray
,stroke-dashoffset
,stroke-linecap
,stroke-linejoin
,stroke-miterlimit
,stroke-opacity
,stroke-width
,transform
,vector-effect
,visibility
- ARIA Attributes
aria-activedescendant
,aria-atomic
,aria-autocomplete
,aria-busy
,aria-checked
,aria-colcount
,aria-colindex
,aria-colspan
,aria-controls
,aria-current
,aria-describedby
,aria-details
,aria-disabled
,aria-dropeffect
,aria-errormessage
,aria-expanded
,aria-flowto
,aria-grabbed
,aria-haspopup
,aria-hidden
,aria-invalid
,aria-keyshortcuts
,aria-label
,aria-labelledby
,aria-level
,aria-live
,aria-modal
,aria-multiline
,aria-multiselectable
,aria-orientation
,aria-owns
,aria-placeholder
,aria-posinset
,aria-pressed
,aria-readonly
,aria-relevant
,aria-required
,aria-roledescription
,aria-rowcount
,aria-rowindex
,aria-rowspan
,aria-selected
,aria-setsize
,aria-sort
,aria-valuemax
,aria-valuemin
,aria-valuenow
,aria-valuetext
,role
Usage notes
Categories | Container element |
---|---|
Permitted content | Any number of the following elements, in any order: Animation elements Descriptive elements Shape elements Structural elements Gradient elements <a> , <altGlyphDef> , <clipPath> , <color-profile> , <cursor> , <filter> , <font> , <font-face> , <foreignObject> , <image> , <marker> , <mask> , <pattern> , <script> , <style> , <switch> , <text> , <view> |
Specifications
Specification | Status | Comment |
---|---|---|
SVG Markers The definition of '<marker>' in that specification. | Working Draft | |
Scalable Vector Graphics (SVG) 2 The definition of '<marker>' in that specification. | Candidate Recommendation | |
Scalable Vector Graphics (SVG) 1.1 (Second Edition) The definition of '<marker>' in that specification. | Recommendation | Initial definition |
Browser compatibility
BCD tables only load in the browser
See also
- Related marker properties:
marker-start
,marker-mid
, andmarker-end
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