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Text

new Konva.Text(config)

Text constructor

Parameters​

NameTypeDescription
configObject
direction (optional)Stringdefault is inherit
fontFamily (optional)Stringdefault is Arial
fontSize (optional)Numberin pixels. Default is 12
fontStyle (optional)Stringcan be 'normal', 'italic', or 'bold', '500' or even 'italic bold'. 'normal' is the default.
fontVariant (optional)Stringcan be normal or small-caps. Default is normal
textDecoration (optional)Stringcan be line-through, underline or empty string. Default is empty string.
textString
align (optional)Stringcan be left, center, right or justify
verticalAlign (optional)Stringcan be top, middle or bottom
padding (optional)Number
lineHeight (optional)Numberdefault is 1
wrap (optional)Stringcan be "word", "char", or "none". Default is word
ellipsis (optional)Booleancan be true or false. Default is false. if Konva.Text config is set to wrap="none" and ellipsis=true, then it will add "..." to the end
fill (optional)Stringfill color
fillPatternImage (optional)Imagefill pattern image
fillPatternX (optional)Number
fillPatternY (optional)Number
fillPatternOffset (optional)Objectobject with x and y component
fillPatternOffsetX (optional)Number
fillPatternOffsetY (optional)Number
fillPatternScale (optional)Objectobject with x and y component
fillPatternScaleX (optional)Number
fillPatternScaleY (optional)Number
fillPatternRotation (optional)Number
fillPatternRepeat (optional)Stringcan be "repeat", "repeat-x", "repeat-y", or "no-repeat". The default is "no-repeat"
fillLinearGradientStartPoint (optional)Objectobject with x and y component
fillLinearGradientStartPointX (optional)Number
fillLinearGradientStartPointY (optional)Number
fillLinearGradientEndPoint (optional)Objectobject with x and y component
fillLinearGradientEndPointX (optional)Number
fillLinearGradientEndPointY (optional)Number
fillLinearGradientColorStops (optional)Arrayarray of color stops
fillRadialGradientStartPoint (optional)Objectobject with x and y component
fillRadialGradientStartPointX (optional)Number
fillRadialGradientStartPointY (optional)Number
fillRadialGradientEndPoint (optional)Objectobject with x and y component
fillRadialGradientEndPointX (optional)Number
fillRadialGradientEndPointY (optional)Number
fillRadialGradientStartRadius (optional)Number
fillRadialGradientEndRadius (optional)Number
fillRadialGradientColorStops (optional)Arrayarray of color stops
fillEnabled (optional)Booleanflag which enables or disables the fill. The default value is true
fillPriority (optional)Stringcan be color, linear-gradient, radial-graident, or pattern. The default value is color. The fillPriority property makes it really easy to toggle between different fill types. For example, if you want to toggle between a fill color style and a fill pattern style, simply set the fill property and the fillPattern properties, and then use setFillPriority('color') to render the shape with a color fill, or use setFillPriority('pattern') to render the shape with the pattern fill configuration
stroke (optional)Stringstroke color
strokeWidth (optional)Numberstroke width
fillAfterStrokeEnabled (optional)BooleanShould we draw fill AFTER stroke? Default is false.
hitStrokeWidth (optional)Numbersize of the stroke on hit canvas. The default is "auto" - equals to strokeWidth
strokeHitEnabled (optional)Booleanflag which enables or disables stroke hit region. The default is true
perfectDrawEnabled (optional)Booleanflag which enables or disables using buffer canvas. The default is true
shadowForStrokeEnabled (optional)Booleanflag which enables or disables shadow for stroke. The default is true
strokeScaleEnabled (optional)Booleanflag which enables or disables stroke scale. The default is true
strokeEnabled (optional)Booleanflag which enables or disables the stroke. The default value is true
lineJoin (optional)Stringcan be miter, round, or bevel. The default is miter
lineCap (optional)Stringcan be butt, round, or square. The default is butt
shadowColor (optional)String
shadowBlur (optional)Number
shadowOffset (optional)Objectobject with x and y component
shadowOffsetX (optional)Number
shadowOffsetY (optional)Number
shadowOpacity (optional)Numbershadow opacity. Can be any real number between 0 and 1
shadowEnabled (optional)Booleanflag which enables or disables the shadow. The default value is true
dash (optional)Array
dashEnabled (optional)Booleanflag which enables or disables the dashArray. The default value is true
x (optional)Number
y (optional)Number
width (optional)Number
height (optional)Number
visible (optional)Boolean
listening (optional)Booleanwhether or not the node is listening for events
id (optional)Stringunique id
name (optional)Stringnon-unique name
opacity (optional)Numberdetermines node opacity. Can be any number between 0 and 1
scale (optional)Objectset scale
scaleX (optional)Numberset scale x
scaleY (optional)Numberset scale y
rotation (optional)Numberrotation in degrees
offset (optional)Objectoffset from center point and rotation point
offsetX (optional)Numberset offset x
offsetY (optional)Numberset offset y
draggable (optional)Booleanmakes the node draggable. When stages are draggable, you can drag and drop the entire stage by dragging any portion of the stage
dragDistance (optional)Number
dragBoundFunc (optional)function

Inherited from: Konva.Shape

Own Methods​

getTextWidth()​

get pure text width without padding

Returns: Number

measureSize(text)​

measure string with the font of current text shape. That method can't handle multiline text.

Parameters:

  • text (String): text to measure

Returns: Object { width , height } of measured text

_shouldHandleEllipsis(currentHeightPx)​

whether to handle ellipsis, there are two cases: 1. the current line is the last line 2. wrap is NONE

Parameters:

  • currentHeightPx (Number)

Returns: Boolean

width(width)​

get/set width of text area, which includes padding.

Parameters:

  • width (Number)

Returns: Number

Example:

// get width
var width = text.width();

// set width
text.width(20);

// set to auto
text.width('auto');
text.width() // will return calculated width, and not "auto"

height(height)​

get/set the height of the text area, which takes into account multi-line text, line heights, and padding.

Parameters:

  • height (Number)

Returns: Number

Example:

// get height
var height = text.height();

// set height
text.height(20);

// set to auto
text.height('auto');
text.height() // will return calculated height, and not "auto"

direction(direction)​

get/set direction

Parameters:

  • direction (String)

Returns: String

Example:

// get direction
var direction = text.direction();

// set direction
text.direction('rtl');

fontFamily(fontFamily)​

get/set font family

Parameters:

  • fontFamily (String)

Returns: String

Example:

// get font family
var fontFamily = text.fontFamily();

// set font family
text.fontFamily('Arial');

fontSize(fontSize)​

get/set font size in pixels

Parameters:

  • fontSize (Number)

Returns: Number

Example:

// get font size
var fontSize = text.fontSize();

// set font size to 22px
text.fontSize(22);

fontStyle(fontStyle)​

get/set font style. Can be 'normal', 'italic', or 'bold', '500' or even 'italic bold'. 'normal' is the default.

Parameters:

  • fontStyle (String)

Returns: String

Example:

// get font style
var fontStyle = text.fontStyle();

// set font style
text.fontStyle('bold');

fontVariant(fontVariant)​

get/set font variant. Can be 'normal' or 'small-caps'. 'normal' is the default.

Parameters:

  • fontVariant (String)

Returns: String

Example:

// get font variant
var fontVariant = text.fontVariant();

// set font variant
text.fontVariant('small-caps');

padding(padding)​

get/set padding

Parameters:

  • padding (Number)

Returns: Number

Example:

// get padding
var padding = text.padding();

// set padding to 10 pixels
text.padding(10);

align(align)​

get/set horizontal align of text. Can be 'left', 'center', 'right' or 'justify'

Parameters:

  • align (String)

Returns: String

Example:

// get text align
var align = text.align();

// center text
text.align('center');

// align text to right
text.align('right');

// justify text

verticalAlign(verticalAlign)​

get/set vertical align of text. Can be 'top', 'middle', 'bottom'.

Parameters:

  • verticalAlign (String)

Returns: String

Example:

// get text vertical align
var verticalAlign = text.verticalAlign();

// center text
text.verticalAlign('middle');

lineHeight(lineHeight)​

get/set line height. The default is 1.

Parameters:

  • lineHeight (Number)

Returns: Number

Example:

// get line height
var lineHeight = text.lineHeight();

// set the line height
text.lineHeight(2);

wrap(wrap)​

get/set wrap. Can be "word", "char", or "none". Default is "word". In "word" wrapping any word still can be wrapped if it can't be placed in the required width without breaks.

Parameters:

  • wrap (String)

Returns: String

Example:

// get wrap
var wrap = text.wrap();

// set wrap
text.wrap('word');

ellipsis(ellipsis)​

get/set ellipsis. Can be true or false. Default is false. If ellipses is true, Konva will add "..." at the end of the text if it doesn't have enough space to write characters. That is possible only when you limit both width and height of the text

Parameters:

  • ellipsis (Boolean)

Returns: Boolean

Example:

// get ellipsis param, returns true or false
var ellipsis = text.ellipsis();

// set ellipsis
text.ellipsis(true);

letterSpacing(letterSpacing)​

set letter spacing property. Default value is 0.

Parameters:

  • letterSpacing (Number)

text(text)​

get/set text

Parameters:

  • text (String)

Returns: String

Example:

// get text
var text = text.text();

// set text
text.text('Hello world!');

textDecoration(textDecoration)​

get/set text decoration of a text. Possible values are 'underline', 'line-through' or combination of these values separated by space

Parameters:

  • textDecoration (String)

Returns: String

Example:

// get text decoration
var textDecoration = text.textDecoration();

// underline text
text.textDecoration('underline');

// strike text
text.textDecoration('line-through');

// underline and strike text
text.textDecoration('underline line-through');

charRenderFunc()​

get/set per-character render hook. The callback is invoked for each grapheme before drawing. It can mutate the provided context (e.g. translate, rotate, change styles) and should return void. Note: per-character rendering may disable native kerning/ligatures.

Example:

// apply small x-translation to every second character
text.charRenderFunc(function(props) {
  if (props.index % 2 === 1) {
    props.context.translate(2, 0);
  }
});

Inherited Methods​

getContext()​

Inherited from: Konva.Shape#getContext

getCanvas()​

Inherited from: Konva.Shape#getCanvas

hasShadow()​

returns whether or not a shadow will be rendered

Returns: Boolean

Inherited from: Konva.Shape#hasShadow

hasFill()​

returns whether or not the shape will be filled

Returns: Boolean

Inherited from: Konva.Shape#hasFill

hasStroke()​

returns whether or not the shape will be stroked

Returns: Boolean

Inherited from: Konva.Shape#hasStroke

intersects(point)​

determines if point is in the shape, regardless if other shapes are on top of it. Note: because this method clears a temporary canvas and then redraws the shape, it performs very poorly if executed many times consecutively. Please use the Konva.Stage#getIntersection method if at all possible because it performs much better

Parameters:

  • point (Object)
  • point.x (Number)
  • point.y (Number)

Returns: Boolean

Inherited from: Konva.Shape#intersects

getSelfRect()​

return self rectangle (x, y, width, height) of shape. This method are not taken into account transformation and styles.

Returns: Object rect with {x, y, width, height} properties

Inherited from: Konva.Shape#getSelfRect

Example:

rect.getSelfRect();  // return {x:0, y:0, width:rect.width(), height:rect.height()}
circle.getSelfRect();  // return {x: - circle.width() / 2, y: - circle.height() / 2, width:circle.width(), height:circle.height()}

drawHitFromCache(alphaThreshold)​

draw hit graph using the cached scene canvas

Parameters:

  • alphaThreshold (Integer): alpha channel threshold that determines whether or not a pixel should be drawn onto the hit graph. Must be a value between 0 and 255. The default is 0

Returns: Konva.Shape

Inherited from: Konva.Shape#drawHitFromCache

Example:

shape.cache();
shape.drawHitFromCache();

stroke(color)​

get/set stroke color

Parameters:

  • color (String)

Returns: String

Inherited from: Konva.Shape#stroke

Example:

// get stroke color
var stroke = shape.stroke();

// set stroke color with color string
shape.stroke('green');

// set stroke color with hex
shape.stroke('#00ff00');

// set stroke color with rgb
shape.stroke('rgb(0,255,0)');

// set stroke color with rgba and make it 50% opaque
shape.stroke('rgba(0,255,0,0.5');

strokeWidth(strokeWidth)​

get/set stroke width

Parameters:

  • strokeWidth (Number)

Returns: Number

Inherited from: Konva.Shape#strokeWidth

Example:

// get stroke width
var strokeWidth = shape.strokeWidth();

// set stroke width
shape.strokeWidth(10);

fillAfterStrokeEnabled(fillAfterStrokeEnabled)​

get/set fillAfterStrokeEnabled property. By default Konva is drawing filling first, then stroke on top of the fill. In rare situations you may want a different behavior. When you have a stroke first then fill on top of it. Especially useful for Text objects. Default is false.

Parameters:

  • fillAfterStrokeEnabled (Boolean)

Returns: Boolean

Inherited from: Konva.Shape#fillAfterStrokeEnabled

Example:

// get stroke width
var fillAfterStrokeEnabled = shape.fillAfterStrokeEnabled();

// set stroke width
shape.fillAfterStrokeEnabled(true);

hitStrokeWidth(hitStrokeWidth)​

get/set stroke width for hit detection. Default value is "auto", it means it will be equals to strokeWidth

Parameters:

  • hitStrokeWidth (Number)

Returns: Number

Inherited from: Konva.Shape#hitStrokeWidth

Example:

// get stroke width
var hitStrokeWidth = shape.hitStrokeWidth();

// set hit stroke width
shape.hitStrokeWidth(20);
// set hit stroke width always equals to scene stroke width
shape.hitStrokeWidth('auto');

strokeHitEnabled(strokeHitEnabled)​

deprecated, use hitStrokeWidth instead! get/set strokeHitEnabled property. Useful for performance optimization. You may set shape.strokeHitEnabled(false). In this case stroke will be no draw on hit canvas, so hit area of shape will be decreased (by lineWidth / 2). Remember that non closed line with strokeHitEnabled = false will be not drawn on hit canvas, that is mean line will no trigger pointer events (like mouseover) Default value is true.

Parameters:

  • strokeHitEnabled (Boolean)

Returns: Boolean

Inherited from: Konva.Shape#strokeHitEnabled

Example:

// get strokeHitEnabled
var strokeHitEnabled = shape.strokeHitEnabled();

// set strokeHitEnabled
shape.strokeHitEnabled();

perfectDrawEnabled(perfectDrawEnabled)​

get/set perfectDrawEnabled. If a shape has fill, stroke and opacity you may set perfectDrawEnabled to false to improve performance. See http://konvajs.org/docs/performance/Disable_Perfect_Draw.html for more information. Default value is true

Parameters:

  • perfectDrawEnabled (Boolean)

Returns: Boolean

Inherited from: Konva.Shape#perfectDrawEnabled

Example:

// get perfectDrawEnabled
var perfectDrawEnabled = shape.perfectDrawEnabled();

// set perfectDrawEnabled
shape.perfectDrawEnabled();

shadowForStrokeEnabled(shadowForStrokeEnabled)​

get/set shadowForStrokeEnabled. Useful for performance optimization. You may set shape.shadowForStrokeEnabled(false). In this case stroke will no effect shadow. Remember if you set shadowForStrokeEnabled = false for non closed line - that line will have no shadow!. Default value is true

Parameters:

  • shadowForStrokeEnabled (Boolean)

Returns: Boolean

Inherited from: Konva.Shape#shadowForStrokeEnabled

Example:

// get shadowForStrokeEnabled
var shadowForStrokeEnabled = shape.shadowForStrokeEnabled();

// set shadowForStrokeEnabled
shape.shadowForStrokeEnabled();

lineJoin(lineJoin)​

get/set line join. Can be miter, round, or bevel. The default is miter

Parameters:

  • lineJoin (String)

Returns: String

Inherited from: Konva.Shape#lineJoin

Example:

// get line join
var lineJoin = shape.lineJoin();

// set line join
shape.lineJoin('round');

lineCap(lineCap)​

get/set line cap. Can be butt, round, or square

Parameters:

  • lineCap (String)

Returns: String

Inherited from: Konva.Shape#lineCap

Example:

// get line cap
var lineCap = shape.lineCap();

// set line cap
shape.lineCap('round');

miterLimit(miterLimit)​

get/set miterLimit.

Parameters:

  • miterLimit (Number)

Returns: Number

Inherited from: Konva.Shape#miterLimit

Example:

// get miter limit
var miterLimit = shape.miterLimit();

// set miter limit
shape.miterLimit(10);

sceneFunc(drawFunc)​

get/set scene draw function. That function is used to draw the shape on a canvas. Also that function will be used to draw hit area of the shape, in case if hitFunc is not defined.

Parameters:

  • drawFunc (function): drawing function

Returns: function

Inherited from: Konva.Shape#sceneFunc

Example:

// get scene draw function
var sceneFunc = shape.sceneFunc();

// set scene draw function
shape.sceneFunc(function(context, shape) {
  context.beginPath();
  context.rect(0, 0, shape.width(), shape.height());
  context.closePath();
  // important Konva method that fill and stroke shape from its properties
  // like stroke and fill
  context.fillStrokeShape(shape);
});

hitFunc(drawFunc)​

get/set hit draw function. That function is used to draw custom hit area of a shape.

Parameters:

  • drawFunc (function): drawing function

Returns: function

Inherited from: Konva.Shape#hitFunc

Example:

// get hit draw function
var hitFunc = shape.hitFunc();

// set hit draw function
shape.hitFunc(function(context) {
  context.beginPath();
  context.rect(0, 0, shape.width(), shape.height());
  context.closePath();
  // important Konva method that fill and stroke shape from its properties
  context.fillStrokeShape(shape);
});

dash(dash)​

get/set dash array for stroke.

Parameters:

  • dash (Array)

Returns: Array

Inherited from: Konva.Shape#dash

Example:

// apply dashed stroke that is 10px long and 5 pixels apart
 line.dash([10, 5]);
 // apply dashed stroke that is made up of alternating dashed
 // lines that are 10px long and 20px apart, and dots that have
 // a radius of 5px and are 20px apart
 line.dash([10, 20, 0.001, 20]);

shadowColor(color)​

get/set shadow color

Parameters:

  • color (String)

Returns: String

Inherited from: Konva.Shape#shadowColor

Example:

// get shadow color
var shadow = shape.shadowColor();

// set shadow color with color string
shape.shadowColor('green');

// set shadow color with hex
shape.shadowColor('#00ff00');

// set shadow color with rgb
shape.shadowColor('rgb(0,255,0)');

// set shadow color with rgba and make it 50% opaque
shape.shadowColor('rgba(0,255,0,0.5');

shadowBlur(blur)​

get/set shadow blur

Parameters:

  • blur (Number)

Returns: Number

Inherited from: Konva.Shape#shadowBlur

Example:

// get shadow blur
var shadowBlur = shape.shadowBlur();

// set shadow blur
shape.shadowBlur(10);

shadowOpacity(opacity)​

get/set shadow opacity. must be a value between 0 and 1

Parameters:

  • opacity (Number)

Returns: Number

Inherited from: Konva.Shape#shadowOpacity

Example:

// get shadow opacity
var shadowOpacity = shape.shadowOpacity();

// set shadow opacity
shape.shadowOpacity(0.5);

shadowOffset(offset)​

get/set shadow offset

Parameters:

  • offset (Object)
  • offset.x (Number)
  • offset.y (Number)

Returns: Object

Inherited from: Konva.Shape#shadowOffset

Example:

// get shadow offset
var shadowOffset = shape.shadowOffset();

// set shadow offset
shape.shadowOffset({
  x: 20,
  y: 10
});

shadowOffsetX(x)​

get/set shadow offset x

Parameters:

  • x (Number)

Returns: Number

Inherited from: Konva.Shape#shadowOffsetX

Example:

// get shadow offset x
var shadowOffsetX = shape.shadowOffsetX();

// set shadow offset x
shape.shadowOffsetX(5);

shadowOffsetY(y)​

get/set shadow offset y

Parameters:

  • y (Number)

Returns: Number

Inherited from: Konva.Shape#shadowOffsetY

Example:

// get shadow offset y
var shadowOffsetY = shape.shadowOffsetY();

// set shadow offset y
shape.shadowOffsetY(5);

fillPatternImage(image)​

get/set fill pattern image

Parameters:

  • image (Image): object

Returns: Image

Inherited from: Konva.Shape#fillPatternImage

Example:

// get fill pattern image
var fillPatternImage = shape.fillPatternImage();

// set fill pattern image
var imageObj = new Image();
imageObj.onload = function() {
  shape.fillPatternImage(imageObj);
};
imageObj.src = 'path/to/image/jpg';

fill(color)​

get/set fill color

Parameters:

  • color (String)

Returns: String

Inherited from: Konva.Shape#fill

Example:

// get fill color
var fill = shape.fill();

// set fill color with color string
shape.fill('green');

// set fill color with hex
shape.fill('#00ff00');

// set fill color with rgb
shape.fill('rgb(0,255,0)');

// set fill color with rgba and make it 50% opaque
shape.fill('rgba(0,255,0,0.5');

// shape without fill
shape.fill(null);

fillPatternX(x)​

get/set fill pattern x

Parameters:

  • x (Number)

Returns: Number

Inherited from: Konva.Shape#fillPatternX

Example:

// get fill pattern x
var fillPatternX = shape.fillPatternX();
// set fill pattern x
shape.fillPatternX(20);

fillPatternY(y)​

get/set fill pattern y

Parameters:

  • y (Number)

Returns: Number

Inherited from: Konva.Shape#fillPatternY

Example:

// get fill pattern y
var fillPatternY = shape.fillPatternY();
// set fill pattern y
shape.fillPatternY(20);

fillLinearGradientColorStops(colorStops)​

get/set fill linear gradient color stops

Parameters:

  • colorStops (Array)

Returns: Array colorStops

Inherited from: Konva.Shape#fillLinearGradientColorStops

Example:

// get fill linear gradient color stops
var colorStops = shape.fillLinearGradientColorStops();

// create a linear gradient that starts with red, changes to blue
// halfway through, and then changes to green
shape.fillLinearGradientColorStops(0, 'red', 0.5, 'blue', 1, 'green');

strokeLinearGradientColorStops(colorStops)​

get/set stroke linear gradient color stops

Parameters:

  • colorStops (Array)

Returns: Array colorStops

Inherited from: Konva.Shape#strokeLinearGradientColorStops

Example:

// get stroke linear gradient color stops
var colorStops = shape.strokeLinearGradientColorStops();

// create a linear gradient that starts with red, changes to blue
// halfway through, and then changes to green
shape.strokeLinearGradientColorStops([0, 'red', 0.5, 'blue', 1, 'green']);

fillRadialGradientStartRadius(radius)​

get/set fill radial gradient start radius

Parameters:

  • radius (Number)

Returns: Number

Inherited from: Konva.Shape#fillRadialGradientStartRadius

Example:

// get radial gradient start radius
var startRadius = shape.fillRadialGradientStartRadius();

// set radial gradient start radius
shape.fillRadialGradientStartRadius(0);

fillRadialGradientEndRadius(radius)​

get/set fill radial gradient end radius

Parameters:

  • radius (Number)

Returns: Number

Inherited from: Konva.Shape#fillRadialGradientEndRadius

Example:

// get radial gradient end radius
var endRadius = shape.fillRadialGradientEndRadius();

// set radial gradient end radius
shape.fillRadialGradientEndRadius(100);

fillRadialGradientColorStops(colorStops)​

get/set fill radial gradient color stops

Parameters:

  • colorStops (Number)

Returns: Array

Inherited from: Konva.Shape#fillRadialGradientColorStops

Example:

// get fill radial gradient color stops
var colorStops = shape.fillRadialGradientColorStops();

// create a radial gradient that starts with red, changes to blue
// halfway through, and then changes to green
shape.fillRadialGradientColorStops(0, 'red', 0.5, 'blue', 1, 'green');

fillPatternRepeat(repeat)​

get/set fill pattern repeat. Can be 'repeat', 'repeat-x', 'repeat-y', or 'no-repeat'. The default is 'repeat'

Parameters:

  • repeat (String)

Returns: String

Inherited from: Konva.Shape#fillPatternRepeat

Example:

// get fill pattern repeat
var repeat = shape.fillPatternRepeat();

// repeat pattern in x direction only
shape.fillPatternRepeat('repeat-x');

// do not repeat the pattern
shape.fillPatternRepeat('no-repeat');

fillEnabled(enabled)​

get/set fill enabled flag

Parameters:

  • enabled (Boolean)

Returns: Boolean

Inherited from: Konva.Shape#fillEnabled

Example:

// get fill enabled flag
var fillEnabled = shape.fillEnabled();

// disable fill
shape.fillEnabled(false);

// enable fill
shape.fillEnabled(true);

strokeEnabled(enabled)​

get/set stroke enabled flag

Parameters:

  • enabled (Boolean)

Returns: Boolean

Inherited from: Konva.Shape#strokeEnabled

Example:

// get stroke enabled flag
var strokeEnabled = shape.strokeEnabled();

// disable stroke
shape.strokeEnabled(false);

// enable stroke
shape.strokeEnabled(true);

shadowEnabled(enabled)​

get/set shadow enabled flag

Parameters:

  • enabled (Boolean)

Returns: Boolean

Inherited from: Konva.Shape#shadowEnabled

Example:

// get shadow enabled flag
var shadowEnabled = shape.shadowEnabled();

// disable shadow
shape.shadowEnabled(false);

// enable shadow
shape.shadowEnabled(true);

dashEnabled(enabled)​

get/set dash enabled flag

Parameters:

  • enabled (Boolean)

Returns: Boolean

Inherited from: Konva.Shape#dashEnabled

Example:

// get dash enabled flag
var dashEnabled = shape.dashEnabled();

// disable dash
shape.dashEnabled(false);

// enable dash
shape.dashEnabled(true);

strokeScaleEnabled(enabled)​

get/set strokeScale enabled flag

Parameters:

  • enabled (Boolean)

Returns: Boolean

Inherited from: Konva.Shape#strokeScaleEnabled

Example:

// get stroke scale enabled flag
var strokeScaleEnabled = shape.strokeScaleEnabled();

// disable stroke scale
shape.strokeScaleEnabled(false);

// enable stroke scale
shape.strokeScaleEnabled(true);

fillPriority(priority)​

get/set fill priority. can be color, pattern, linear-gradient, or radial-gradient. The default is color. This is handy if you want to toggle between different fill types.

Parameters:

  • priority (String)

Returns: String

Inherited from: Konva.Shape#fillPriority

Example:

// get fill priority
var fillPriority = shape.fillPriority();

// set fill priority
shape.fillPriority('linear-gradient');

fillPatternOffset(offset)​

get/set fill pattern offset

Parameters:

  • offset (Object)
  • offset.x (Number)
  • offset.y (Number)

Returns: Object

Inherited from: Konva.Shape#fillPatternOffset

Example:

// get fill pattern offset
var patternOffset = shape.fillPatternOffset();

// set fill pattern offset
shape.fillPatternOffset({
  x: 20,
  y: 10
});

fillPatternOffsetX(x)​

get/set fill pattern offset x

Parameters:

  • x (Number)

Returns: Number

Inherited from: Konva.Shape#fillPatternOffsetX

Example:

// get fill pattern offset x
var patternOffsetX = shape.fillPatternOffsetX();

// set fill pattern offset x
shape.fillPatternOffsetX(20);

fillPatternOffsetY(y)​

get/set fill pattern offset y

Parameters:

  • y (Number)

Returns: Number

Inherited from: Konva.Shape#fillPatternOffsetY

Example:

// get fill pattern offset y
var patternOffsetY = shape.fillPatternOffsetY();

// set fill pattern offset y
shape.fillPatternOffsetY(10);

fillPatternScale(scale)​

get/set fill pattern scale

Parameters:

  • scale (Object)
  • scale.x (Number)
  • scale.y (Number)

Returns: Object

Inherited from: Konva.Shape#fillPatternScale

Example:

// get fill pattern scale
var patternScale = shape.fillPatternScale();

// set fill pattern scale
shape.fillPatternScale({
  x: 2,
  y: 2
});

fillPatternScaleX(x)​

get/set fill pattern scale x

Parameters:

  • x (Number)

Returns: Number

Inherited from: Konva.Shape#fillPatternScaleX

Example:

// get fill pattern scale x
var patternScaleX = shape.fillPatternScaleX();

// set fill pattern scale x
shape.fillPatternScaleX(2);

fillPatternScaleY(y)​

get/set fill pattern scale y

Parameters:

  • y (Number)

Returns: Number

Inherited from: Konva.Shape#fillPatternScaleY

Example:

// get fill pattern scale y
var patternScaleY = shape.fillPatternScaleY();

// set fill pattern scale y
shape.fillPatternScaleY(2);

fillLinearGradientStartPoint(startPoint)​

get/set fill linear gradient start point

Parameters:

  • startPoint (Object)
  • startPoint.x (Number)
  • startPoint.y (Number)

Returns: Object

Inherited from: Konva.Shape#fillLinearGradientStartPoint

Example:

// get fill linear gradient start point
var startPoint = shape.fillLinearGradientStartPoint();

// set fill linear gradient start point
shape.fillLinearGradientStartPoint({
  x: 20,
  y: 10
});

strokeLinearGradientStartPoint(startPoint)​

get/set stroke linear gradient start point

Parameters:

  • startPoint (Object)
  • startPoint.x (Number)
  • startPoint.y (Number)

Returns: Object

Inherited from: Konva.Shape#strokeLinearGradientStartPoint

Example:

// get stroke linear gradient start point
var startPoint = shape.strokeLinearGradientStartPoint();

// set stroke linear gradient start point
shape.strokeLinearGradientStartPoint({
  x: 20,
  y: 10
});

fillLinearGradientStartPointX(x)​

get/set fill linear gradient start point x

Parameters:

  • x (Number)

Returns: Number

Inherited from: Konva.Shape#fillLinearGradientStartPointX

Example:

// get fill linear gradient start point x
var startPointX = shape.fillLinearGradientStartPointX();

// set fill linear gradient start point x
shape.fillLinearGradientStartPointX(20);

linearLinearGradientStartPointX(x)​

get/set stroke linear gradient start point x

Parameters:

  • x (Number)

Returns: Number

Inherited from: Konva.Shape#linearLinearGradientStartPointX

Example:

// get stroke linear gradient start point x
var startPointX = shape.strokeLinearGradientStartPointX();

// set stroke linear gradient start point x
shape.strokeLinearGradientStartPointX(20);

fillLinearGradientStartPointY(y)​

get/set fill linear gradient start point y

Parameters:

  • y (Number)

Returns: Number

Inherited from: Konva.Shape#fillLinearGradientStartPointY

Example:

// get fill linear gradient start point y
var startPointY = shape.fillLinearGradientStartPointY();

// set fill linear gradient start point y
shape.fillLinearGradientStartPointY(20);

strokeLinearGradientStartPointY(y)​

get/set stroke linear gradient start point y

Parameters:

  • y (Number)

Returns: Number

Inherited from: Konva.Shape#strokeLinearGradientStartPointY

Example:

// get stroke linear gradient start point y
var startPointY = shape.strokeLinearGradientStartPointY();

// set stroke linear gradient start point y
shape.strokeLinearGradientStartPointY(20);

fillLinearGradientEndPoint(endPoint)​

get/set fill linear gradient end point

Parameters:

  • endPoint (Object)
  • endPoint.x (Number)
  • endPoint.y (Number)

Returns: Object

Inherited from: Konva.Shape#fillLinearGradientEndPoint

Example:

// get fill linear gradient end point
var endPoint = shape.fillLinearGradientEndPoint();

// set fill linear gradient end point
shape.fillLinearGradientEndPoint({
  x: 20,
  y: 10
});

strokeLinearGradientEndPoint(endPoint)​

get/set stroke linear gradient end point

Parameters:

  • endPoint (Object)
  • endPoint.x (Number)
  • endPoint.y (Number)

Returns: Object

Inherited from: Konva.Shape#strokeLinearGradientEndPoint

Example:

// get stroke linear gradient end point
var endPoint = shape.strokeLinearGradientEndPoint();

// set stroke linear gradient end point
shape.strokeLinearGradientEndPoint({
  x: 20,
  y: 10
});

fillLinearGradientEndPointX(x)​

get/set fill linear gradient end point x

Parameters:

  • x (Number)

Returns: Number

Inherited from: Konva.Shape#fillLinearGradientEndPointX

Example:

// get fill linear gradient end point x
var endPointX = shape.fillLinearGradientEndPointX();

// set fill linear gradient end point x
shape.fillLinearGradientEndPointX(20);

strokeLinearGradientEndPointX(x)​

get/set fill linear gradient end point x

Parameters:

  • x (Number)

Returns: Number

Inherited from: Konva.Shape#strokeLinearGradientEndPointX

Example:

// get stroke linear gradient end point x
var endPointX = shape.strokeLinearGradientEndPointX();

// set stroke linear gradient end point x
shape.strokeLinearGradientEndPointX(20);

fillLinearGradientEndPointY(y)​

get/set fill linear gradient end point y

Parameters:

  • y (Number)

Returns: Number

Inherited from: Konva.Shape#fillLinearGradientEndPointY

Example:

// get fill linear gradient end point y
var endPointY = shape.fillLinearGradientEndPointY();

// set fill linear gradient end point y
shape.fillLinearGradientEndPointY(20);

strokeLinearGradientEndPointY(y)​

get/set stroke linear gradient end point y

Parameters:

  • y (Number)

Returns: Number

Inherited from: Konva.Shape#strokeLinearGradientEndPointY

Example:

// get stroke linear gradient end point y
var endPointY = shape.strokeLinearGradientEndPointY();

// set stroke linear gradient end point y
shape.strokeLinearGradientEndPointY(20);

fillRadialGradientStartPoint(startPoint)​

get/set fill radial gradient start point

Parameters:

  • startPoint (Object)
  • startPoint.x (Number)
  • startPoint.y (Number)

Returns: Object

Inherited from: Konva.Shape#fillRadialGradientStartPoint

Example:

// get fill radial gradient start point
var startPoint = shape.fillRadialGradientStartPoint();

// set fill radial gradient start point
shape.fillRadialGradientStartPoint({
  x: 20,
  y: 10
});

fillRadialGradientStartPointX(x)​

get/set fill radial gradient start point x

Parameters:

  • x (Number)

Returns: Number

Inherited from: Konva.Shape#fillRadialGradientStartPointX

Example:

// get fill radial gradient start point x
var startPointX = shape.fillRadialGradientStartPointX();

// set fill radial gradient start point x
shape.fillRadialGradientStartPointX(20);

fillRadialGradientStartPointY(y)​

get/set fill radial gradient start point y

Parameters:

  • y (Number)

Returns: Number

Inherited from: Konva.Shape#fillRadialGradientStartPointY

Example:

// get fill radial gradient start point y
var startPointY = shape.fillRadialGradientStartPointY();

// set fill radial gradient start point y
shape.fillRadialGradientStartPointY(20);

fillRadialGradientEndPoint(endPoint)​

get/set fill radial gradient end point

Parameters:

  • endPoint (Object)
  • endPoint.x (Number)
  • endPoint.y (Number)

Returns: Object

Inherited from: Konva.Shape#fillRadialGradientEndPoint

Example:

// get fill radial gradient end point
var endPoint = shape.fillRadialGradientEndPoint();

// set fill radial gradient end point
shape.fillRadialGradientEndPoint({
  x: 20,
  y: 10
});

fillRadialGradientEndPointX(x)​

get/set fill radial gradient end point x

Parameters:

  • x (Number)

Returns: Number

Inherited from: Konva.Shape#fillRadialGradientEndPointX

Example:

// get fill radial gradient end point x
var endPointX = shape.fillRadialGradientEndPointX();

// set fill radial gradient end point x
shape.fillRadialGradientEndPointX(20);

fillRadialGradientEndPointY(y)​

get/set fill radial gradient end point y

Parameters:

  • y (Number)

Returns: Number

Inherited from: Konva.Shape#fillRadialGradientEndPointY

Example:

// get fill radial gradient end point y
var endPointY = shape.fillRadialGradientEndPointY();

// set fill radial gradient end point y
shape.fillRadialGradientEndPointY(20);

fillPatternRotation(rotation)​

get/set fill pattern rotation in degrees

Parameters:

  • rotation (Number)

Returns: Konva.Shape

Inherited from: Konva.Shape#fillPatternRotation

Example:

// get fill pattern rotation
var patternRotation = shape.fillPatternRotation();

// set fill pattern rotation
shape.fillPatternRotation(20);

fillRule(rotation)​

get/set fill rule

Parameters:

  • rotation (CanvasFillRule)

Returns: Konva.Shape

Inherited from: Konva.Shape#fillRule

Example:

// get fill rule
var fillRule = shape.fillRule();

// set fill rule
shape.fillRule('evenodd');

clearCache()​

clear cached canvas

Returns: Konva.Node

Inherited from: Konva.Node#clearCache

Example:

node.clearCache();

cache(config)​

cache node to improve drawing performance, apply filters, or create more accurate hit regions. For all basic shapes size of cache canvas will be automatically detected. If you need to cache your custom Konva.Shape instance you have to pass shape's bounding box properties. Look at https://konvajs.org/docs/performance/Shape_Caching.html for more information.

Parameters:

  • config (Object) (optional)
  • config.x (Number) (optional)
  • config.y (Number) (optional)
  • config.width (Number) (optional)
  • config.height (Number) (optional)
  • config.offset (Number) (optional): increase canvas size by offset pixel in all directions.
  • config.drawBorder (Boolean) (optional): when set to true, a red border will be drawn around the cached region for debugging purposes
  • config.pixelRatio (Number) (optional): change quality (or pixel ratio) of cached image. pixelRatio = 2 will produce 2x sized cache.
  • config.imageSmoothingEnabled (Boolean) (optional): control imageSmoothingEnabled property of created canvas for cache
  • config.hitCanvasPixelRatio (Number) (optional): change quality (or pixel ratio) of cached hit canvas.

Returns: Konva.Node

Inherited from: Konva.Node#cache

Example:

// cache a shape with the x,y position of the bounding box at the center and
// the width and height of the bounding box equal to the width and height of
// the shape obtained from shape.width() and shape.height()
image.cache();

// cache a node and define the bounding box position and size
node.cache({
  x: -30,
  y: -30,
  width: 100,
  height: 200
});

// cache a node and draw a red border around the bounding box
// for debugging purposes
node.cache({
  x: -30,
  y: -30,
  width: 100,
  height: 200,
  offset : 10,
  drawBorder: true
});

isCached()​

determine if node is currently cached

Returns: Boolean

Inherited from: Konva.Node#isCached

getClientRect(config)​

Return client rectangle {x, y, width, height} of node. This rectangle also include all styling (strokes, shadows, etc). The purpose of the method is similar to getBoundingClientRect API of the DOM.

Parameters:

  • config (Object)
  • config.skipTransform (Boolean) (optional): should we apply transform to node for calculating rect?
  • config.skipShadow (Boolean) (optional): should we apply shadow to the node for calculating bound box?
  • config.skipStroke (Boolean) (optional): should we apply stroke to the node for calculating bound box?
  • config.relativeTo (Object) (optional): calculate client rect relative to one of the parents

Returns: Object rect with {x, y, width, height} properties

Inherited from: Konva.Node#getClientRect

Example:

var rect = new Konva.Rect({
     width : 100,
     height : 100,
     x : 50,
     y : 50,
     strokeWidth : 4,
     stroke : 'black',
     offsetX : 50,
     scaleY : 2
});

// get client rect without think off transformations (position, rotation, scale, offset, etc)
rect.getClientRect({ skipTransform: true});
// returns {
//     x : -2,   // two pixels for stroke / 2
//     y : -2,
//     width : 104, // increased by 4 for stroke
//     height : 104
//}

// get client rect with transformation applied
rect.getClientRect();
// returns Object {x: -2, y: 46, width: 104, height: 208}

on(evtStr, handler)​

bind events to the node. KonvaJS supports mouseover, mousemove, mouseout, mouseenter, mouseleave, mousedown, mouseup, wheel, contextmenu, click, dblclick, touchstart, touchmove, touchend, tap, dbltap, dragstart, dragmove, and dragend events. Pass in a string of events delimited by a space to bind multiple events at once such as 'mousedown mouseup mousemove'. Include a namespace to bind an event by name such as 'click.foobar'.

Parameters:

  • evtStr (String): e.g. 'click', 'mousedown touchstart', 'mousedown.foo touchstart.foo'
  • handler (function): The handler function. The first argument of that function is event object. Event object has target as main target of the event, currentTarget as current node listener and evt as native browser event.

Returns: Konva.Node

Inherited from: Konva.Node#on

Example:

// add click listener
node.on('click', function() {
  console.log('you clicked me!');
});

// get the target node
node.on('click', function(evt) {
  console.log(evt.target);
});

// stop event propagation
node.on('click', function(evt) {
  evt.cancelBubble = true;
});

// bind multiple listeners
node.on('click touchstart', function() {
  console.log('you clicked/touched me!');
});

// namespace listener
node.on('click.foo', function() {
  console.log('you clicked/touched me!');
});

// get the event type
node.on('click tap', function(evt) {
  var eventType = evt.type;
});

// get native event object
node.on('click tap', function(evt) {
  var nativeEvent = evt.evt;
});

// for change events, get the old and new val
node.on('xChange', function(evt) {
  var oldVal = evt.oldVal;
  var newVal = evt.newVal;
});

// get event targets
// with event delegations
layer.on('click', 'Group', function(evt) {
  var shape = evt.target;
  var group = evt.currentTarget;
});

off(evtStr)​

remove event bindings from the node. Pass in a string of event types delimmited by a space to remove multiple event bindings at once such as 'mousedown mouseup mousemove'. include a namespace to remove an event binding by name such as 'click.foobar'. If you only give a name like '.foobar', all events in that namespace will be removed.

Parameters:

  • evtStr (String): e.g. 'click', 'mousedown touchstart', '.foobar'

Returns: Konva.Node

Inherited from: Konva.Node#off

Example:

// remove listener
node.off('click');

// remove multiple listeners
node.off('click touchstart');

// remove listener by name
node.off('click.foo');

remove()​

remove a node from parent, but don't destroy. You can reuse the node later.

Returns: Konva.Node

Inherited from: Konva.Node#remove

Example:

node.remove();

destroy()​

remove and destroy a node. Kill it and delete forever! You should not reuse node after destroy(). If the node is a container (Group, Stage or Layer) it will destroy all children too.

Inherited from: Konva.Node#destroy

Example:

node.destroy();

getAttr(attr)​

get attr

Parameters:

  • attr (String)

Returns: Integer|String|Object|Array

Inherited from: Konva.Node#getAttr

Example:

var x = node.getAttr('x');

getAncestors()​

get ancestors

Returns: Array

Inherited from: Konva.Node#getAncestors

Example:

shape.getAncestors().forEach(function(node) {
  console.log(node.id());
})

getAttrs()​

get attrs object literal

Returns: Object

Inherited from: Konva.Node#getAttrs

setAttrs(config)​

set multiple attrs at once using an object literal

Parameters:

  • config (Object): object containing key value pairs

Returns: Konva.Node

Inherited from: Konva.Node#setAttrs

Example:

node.setAttrs({
  x: 5,
  fill: 'red'
});

isListening()​

determine if node is listening for events by taking into account ancestors. Parent | Self | isListening listening | listening | ----------+-----------+------------ T | T | T T | F | F F | T | F F | F | F

Returns: Boolean

Inherited from: Konva.Node#isListening

isVisible()​

determine if node is visible by taking into account ancestors. Parent | Self | isVisible visible | visible | ----------+-----------+------------ T | T | T T | F | F F | T | F F | F | F

Returns: Boolean

Inherited from: Konva.Node#isVisible

show()​

show node. set visible = true

Returns: Konva.Node

Inherited from: Konva.Node#show

hide()​

hide node. Hidden nodes are no longer detectable

Returns: Konva.Node

Inherited from: Konva.Node#hide

getAbsoluteZIndex()​

get absolute z-index which takes into account sibling and ancestor indices

Returns: Integer

Inherited from: Konva.Node#getAbsoluteZIndex

getDepth()​

get node depth in node tree. Returns an integer. e.g. Stage depth will always be 0. Layers will always be 1. Groups and Shapes will always be >= 2

Returns: Integer

Inherited from: Konva.Node#getDepth

getRelativePointerPosition()​

get position of first pointer (like mouse or first touch) relative to local coordinates of current node

Returns: Konva.Node

Inherited from: Konva.Node#getRelativePointerPosition

Example:

// let's think we have a rectangle at position x = 10, y = 10
// now we clicked at x = 15, y = 15 of the stage
// if you want to know position of the click, related to the rectangle you can use
rect.getRelativePointerPosition();

getAbsolutePosition(Ancestor)​

get absolute position of a node. That function can be used to calculate absolute position, but relative to any ancestor

Parameters:

  • Ancestor (Object): optional ancestor node

Returns: Konva.Node

Inherited from: Konva.Node#getAbsolutePosition

Example:

// returns absolute position relative to top-left corner of canvas
node.getAbsolutePosition();

// calculate absolute position of node, inside stage
// so stage transforms are ignored
node.getAbsolutePosition(stage)

move(change)​

move node by an amount relative to its current position

Parameters:

  • change (Object)
  • change.x (Number)
  • change.y (Number)

Returns: Konva.Node

Inherited from: Konva.Node#move

Example:

// move node in x direction by 1px and y direction by 2px
node.move({
  x: 1,
  y: 2
});

rotate(theta)​

rotate node by an amount in degrees relative to its current rotation

Parameters:

  • theta (Number)

Returns: Konva.Node

Inherited from: Konva.Node#rotate

moveToTop()​

move node to the top of its siblings

Returns: Boolean

Inherited from: Konva.Node#moveToTop

moveUp()​

move node up

Returns: Boolean flag is moved or not

Inherited from: Konva.Node#moveUp

moveDown()​

move node down

Returns: Boolean

Inherited from: Konva.Node#moveDown

moveToBottom()​

move node to the bottom of its siblings

Returns: Boolean

Inherited from: Konva.Node#moveToBottom

getAbsoluteOpacity()​

get absolute opacity

Returns: Number

Inherited from: Konva.Node#getAbsoluteOpacity

moveTo(newContainer)​

move node to another container

Parameters:

  • newContainer (Container)

Returns: Konva.Node

Inherited from: Konva.Node#moveTo

Example:

// move node from current layer into layer2
node.moveTo(layer2);

toObject()​

convert Node into an object for serialization. Returns an object.

Returns: Object

Inherited from: Konva.Node#toObject

toJSON()​

convert Node into a JSON string. Returns a JSON string.

Returns: String

Inherited from: Konva.Node#toJSON

getParent()​

get parent container

Returns: Konva.Node

Inherited from: Konva.Node#getParent

findAncestors(selector, includeSelf, stopNode)​

get all ancestors (parent then parent of the parent, etc) of the node

Parameters:

  • selector (String): selector for search
  • includeSelf (Boolean) (optional): show we think that node is ancestro itself?
  • stopNode (Konva.Node) (optional): optional node where we need to stop searching (one of ancestors)

Returns: Array [ancestors]

Inherited from: Konva.Node#findAncestors

Example:

// get one of the parent group
var parentGroups = node.findAncestors('Group');

findAncestor(selector, includeSelf, stopNode)​

get ancestor (parent or parent of the parent, etc) of the node that match passed selector

Parameters:

  • selector (String): selector for search
  • includeSelf (Boolean) (optional): show we think that node is ancestro itself?
  • stopNode (Konva.Node) (optional): optional node where we need to stop searching (one of ancestors)

Returns: Konva.Node ancestor

Inherited from: Konva.Node#findAncestor

Example:

// get one of the parent group
var group = node.findAncestors('.mygroup');

getLayer()​

get layer ancestor

Returns: Konva.Layer

Inherited from: Konva.Node#getLayer

getStage()​

get stage ancestor

Returns: Konva.Stage

Inherited from: Konva.Node#getStage

fire(eventType, evt, bubble)​

fire event

Parameters:

  • eventType (String): event type. can be a regular event, like click, mouseover, or mouseout, or it can be a custom event, like myCustomEvent
  • evt (Event) (optional): event object
  • bubble (Boolean) (optional): setting the value to false, or leaving it undefined, will result in the event not bubbling. Setting the value to true will result in the event bubbling.

Returns: Konva.Node

Inherited from: Konva.Node#fire

Example:

// manually fire click event
node.fire('click');

// fire custom event
node.fire('foo');

// fire custom event with custom event object
node.fire('foo', {
  bar: 10
});

// fire click event that bubbles
node.fire('click', null, true);

getAbsoluteTransform()​

get absolute transform of the node which takes into account its ancestor transforms

Returns: Konva.Transform

Inherited from: Konva.Node#getAbsoluteTransform

getAbsoluteScale()​

get absolute scale of the node which takes into account its ancestor scales

Returns: Object

Inherited from: Konva.Node#getAbsoluteScale

Example:

// get absolute scale x
var scaleX = node.getAbsoluteScale().x;

getAbsoluteRotation()​

get absolute rotation of the node which takes into account its ancestor rotations

Returns: Number

Inherited from: Konva.Node#getAbsoluteRotation

Example:

// get absolute rotation
var rotation = node.getAbsoluteRotation();

getTransform()​

get transform of the node

Returns: Konva.Transform

Inherited from: Konva.Node#getTransform

clone(obj)​

clone node. Returns a new Node instance with identical attributes. You can also override the node properties with an object literal, enabling you to use an existing node as a template for another node

Parameters:

  • obj (Object): override attrs

Returns: Konva.Node

Inherited from: Konva.Node#clone

Example:

// simple clone
var clone = node.clone();

// clone a node and override the x position
var clone = rect.clone({
  x: 5
});

toCanvas(config)​

converts node into an canvas element.

Parameters:

  • config (Object)
  • config.callback (function): function executed when the composite has completed
  • config.x (Number) (optional): x position of canvas section
  • config.y (Number) (optional): y position of canvas section
  • config.width (Number) (optional): width of canvas section
  • config.height (Number) (optional): height of canvas section
  • config.pixelRatio (Number) (optional): pixelRatio of output canvas. Default is 1. You can use that property to increase quality of the image, for example for super hight quality exports or usage on retina (or similar) displays. pixelRatio will be used to multiply the size of exported image. If you export to 500x500 size with pixelRatio = 2, then produced image will have size 1000x1000.
  • config.imageSmoothingEnabled (Boolean) (optional): set this to false if you want to disable imageSmoothing

Inherited from: Konva.Node#toCanvas

Example:

var canvas = node.toCanvas();

toDataURL(config)​

Creates a composite data URL (base64 string). If MIME type is not specified, then "image/png" will result. For "image/jpeg", specify a quality level as quality (range 0.0 - 1.0)

Parameters:

  • config (Object)
  • config.mimeType (String) (optional): can be "image/png" or "image/jpeg". "image/png" is the default
  • config.x (Number) (optional): x position of canvas section
  • config.y (Number) (optional): y position of canvas section
  • config.width (Number) (optional): width of canvas section
  • config.height (Number) (optional): height of canvas section
  • config.quality (Number) (optional): jpeg quality. If using an "image/jpeg" mimeType, you can specify the quality from 0 to 1, where 0 is very poor quality and 1 is very high quality
  • config.pixelRatio (Number) (optional): pixelRatio of output image url. Default is 1. You can use that property to increase quality of the image, for example for super hight quality exports or usage on retina (or similar) displays. pixelRatio will be used to multiply the size of exported image. If you export to 500x500 size with pixelRatio = 2, then produced image will have size 1000x1000.
  • config.imageSmoothingEnabled (Boolean) (optional): set this to false if you want to disable imageSmoothing

Returns: String

Inherited from: Konva.Node#toDataURL

toImage(config)​

converts node into an image. Since the toImage method is asynchronous, the resulting image can only be retrieved from the config callback or the returned Promise. toImage is most commonly used to cache complex drawings as an image so that they don't have to constantly be redrawn

Parameters:

  • config (Object)
  • config.callback (function) (optional): function executed when the composite has completed
  • config.mimeType (String) (optional): can be "image/png" or "image/jpeg". "image/png" is the default
  • config.x (Number) (optional): x position of canvas section
  • config.y (Number) (optional): y position of canvas section
  • config.width (Number) (optional): width of canvas section
  • config.height (Number) (optional): height of canvas section
  • config.quality (Number) (optional): jpeg quality. If using an "image/jpeg" mimeType, you can specify the quality from 0 to 1, where 0 is very poor quality and 1 is very high quality
  • config.pixelRatio (Number) (optional): pixelRatio of output image. Default is 1. You can use that property to increase quality of the image, for example for super hight quality exports or usage on retina (or similar) displays. pixelRatio will be used to multiply the size of exported image. If you export to 500x500 size with pixelRatio = 2, then produced image will have size 1000x1000.
  • config.imageSmoothingEnabled (Boolean) (optional): set this to false if you want to disable imageSmoothing

Returns: Promise<Image>

Inherited from: Konva.Node#toImage

Example:

var image = node.toImage({
  callback(img) {
    // do stuff with img
  }
});

toBlob(config)​

Converts node into a blob. Since the toBlob method is asynchronous, the resulting blob can only be retrieved from the config callback or the returned Promise.

Parameters:

  • config (Object)
  • config.callback (function) (optional): function executed when the composite has completed
  • config.x (Number) (optional): x position of canvas section
  • config.y (Number) (optional): y position of canvas section
  • config.width (Number) (optional): width of canvas section
  • config.height (Number) (optional): height of canvas section
  • config.pixelRatio (Number) (optional): pixelRatio of output canvas. Default is 1. You can use that property to increase quality of the image, for example for super hight quality exports or usage on retina (or similar) displays. pixelRatio will be used to multiply the size of exported image. If you export to 500x500 size with pixelRatio = 2, then produced image will have size 1000x1000.
  • config.imageSmoothingEnabled (Boolean) (optional): set this to false if you want to disable imageSmoothing

Returns: Promise<Blob>

Inherited from: Konva.Node#toBlob

Example:

var blob = await node.toBlob({});

getClassName()​

get class name, which may return Stage, Layer, Group, or shape class names like Rect, Circle, Text, etc.

Returns: String

Inherited from: Konva.Node#getClassName

getType()​

get the node type, which may return Stage, Layer, Group, or Shape

Returns: String

Inherited from: Konva.Node#getType

addName(name)​

add name to node

Parameters:

  • name (String)

Returns: Konva.Node

Inherited from: Konva.Node#addName

Example:

node.name('red');
node.addName('selected');
node.name(); // return 'red selected'

hasName(name)​

check is node has name

Parameters:

  • name (String)

Returns: Boolean

Inherited from: Konva.Node#hasName

Example:

node.name('red');
node.hasName('red');   // return true
node.hasName('selected'); // return false
node.hasName(''); // return false

removeName(name)​

remove name from node

Parameters:

  • name (String)

Returns: Konva.Node

Inherited from: Konva.Node#removeName

Example:

node.name('red selected');
node.removeName('selected');
node.hasName('selected'); // return false
node.name(); // return 'red'

setAttr(attr, val)​

set attr

Parameters:

  • attr (String)
  • val (*)

Returns: Konva.Node

Inherited from: Konva.Node#setAttr

Example:

node.setAttr('x', 5);

draw()​

draw both scene and hit graphs. If the node being drawn is the stage, all of the layers will be cleared and redrawn

Returns: Konva.Node

Inherited from: Konva.Node#draw

startDrag()​

initiate drag and drop.

Inherited from: Konva.Node#startDrag

stopDrag()​

stop drag and drop

Inherited from: Konva.Node#stopDrag

isDragging()​

determine if node is currently in drag and drop mode

Inherited from: Konva.Node#isDragging

isClientRectOnScreen(margin)​

determine if node (at least partially) is currently in user-visible area

Parameters:

  • margin (Number|Object): optional margin in pixels
  • margin.x (Number)
  • margin.y (Number)

Returns: Boolean

Inherited from: Konva.Node#isClientRectOnScreen

Example:

// get index
// default calculations
var isOnScreen = node.isClientRectOnScreen()
// increase object size (or screen size) for cases when objects close to the screen still need to be marked as "visible"
var isOnScreen = node.isClientRectOnScreen({ x: stage.width(), y: stage.height() })

zIndex(index)​

get/set zIndex relative to the node's siblings who share the same parent. Please remember that zIndex is not absolute (like in CSS). It is relative to parent element only.

Parameters:

  • index (Number)

Returns: Number

Inherited from: Konva.Node#zIndex

Example:

// get index
var index = node.zIndex();

// set index
node.zIndex(2);

absolutePosition(pos)​

get/set node absolute position

Parameters:

  • pos (Object)
  • pos.x (Number)
  • pos.y (Number)

Returns: Object

Inherited from: Konva.Node#absolutePosition

Example:

// get position
var position = node.absolutePosition();

// set position
node.absolutePosition({
  x: 5,
  y: 10
});

position(pos)​

get/set node position relative to parent

Parameters:

  • pos (Object)
  • pos.x (Number)
  • pos.y (Number)

Returns: Object

Inherited from: Konva.Node#position

Example:

// get position
var position = node.position();

// set position
node.position({
  x: 5,
  y: 10
});

x(x)​

get/set x position

Parameters:

  • x (Number)

Returns: Object

Inherited from: Konva.Node#x

Example:

// get x
var x = node.x();

// set x
node.x(5);

y(y)​

get/set y position

Parameters:

  • y (Number)

Returns: Integer

Inherited from: Konva.Node#y

Example:

// get y
var y = node.y();

// set y
node.y(5);

globalCompositeOperation(type)​

get/set globalCompositeOperation of a node. globalCompositeOperation DOESN'T affect hit graph of nodes. So they are still trigger to events as they have default "source-over" globalCompositeOperation.

Parameters:

  • type (String)

Returns: String

Inherited from: Konva.Node#globalCompositeOperation

Example:

// get globalCompositeOperation
var globalCompositeOperation = shape.globalCompositeOperation();

// set globalCompositeOperation
shape.globalCompositeOperation('source-in');

opacity(opacity)​

get/set opacity. Opacity values range from 0 to 1. A node with an opacity of 0 is fully transparent, and a node with an opacity of 1 is fully opaque

Parameters:

  • opacity (Object)

Returns: Number

Inherited from: Konva.Node#opacity

Example:

// get opacity
var opacity = node.opacity();

// set opacity
node.opacity(0.5);

name(name)​

get/set name.

Parameters:

  • name (String)

Returns: String

Inherited from: Konva.Node#name

Example:

// get name
var name = node.name();

// set name
node.name('foo');

// also node may have multiple names (as css classes)
node.name('foo bar');

id(id)​

get/set id. Id is global for whole page.

Parameters:

  • id (String)

Returns: String

Inherited from: Konva.Node#id

Example:

// get id
var name = node.id();

// set id
node.id('foo');

rotation(rotation)​

get/set rotation in degrees

Parameters:

  • rotation (Number)

Returns: Number

Inherited from: Konva.Node#rotation

Example:

// get rotation in degrees
var rotation = node.rotation();

// set rotation in degrees
node.rotation(45);

scale(scale)​

get/set scale

Parameters:

  • scale (Object)
  • scale.x (Number)
  • scale.y (Number)

Returns: Object

Inherited from: Konva.Node#scale

Example:

// get scale
var scale = node.scale();

// set scale
shape.scale({
  x: 2,
  y: 3
});

scaleX(x)​

get/set scale x

Parameters:

  • x (Number)

Returns: Number

Inherited from: Konva.Node#scaleX

Example:

// get scale x
var scaleX = node.scaleX();

// set scale x
node.scaleX(2);

scaleY(y)​

get/set scale y

Parameters:

  • y (Number)

Returns: Number

Inherited from: Konva.Node#scaleY

Example:

// get scale y
var scaleY = node.scaleY();

// set scale y
node.scaleY(2);

skew(skew)​

get/set skew

Parameters:

  • skew (Object)
  • skew.x (Number)
  • skew.y (Number)

Returns: Object

Inherited from: Konva.Node#skew

Example:

// get skew
var skew = node.skew();

// set skew
node.skew({
  x: 20,
  y: 10
});

skewX(x)​

get/set skew x

Parameters:

  • x (Number)

Returns: Number

Inherited from: Konva.Node#skewX

Example:

// get skew x
var skewX = node.skewX();

// set skew x
node.skewX(3);

skewY(y)​

get/set skew y

Parameters:

  • y (Number)

Returns: Number

Inherited from: Konva.Node#skewY

Example:

// get skew y
var skewY = node.skewY();

// set skew y
node.skewY(3);

offsetX(x)​

get/set offset x

Parameters:

  • x (Number)

Returns: Number

Inherited from: Konva.Node#offsetX

Example:

// get offset x
var offsetX = node.offsetX();

// set offset x
node.offsetX(3);

offsetY(y)​

get/set offset y

Parameters:

  • y (Number)

Returns: Number

Inherited from: Konva.Node#offsetY

Example:

// get offset y
var offsetY = node.offsetY();

// set offset y
node.offsetY(3);

dragDistance(distance)​

get/set drag distance

Parameters:

  • distance (Number)

Returns: Number

Inherited from: Konva.Node#dragDistance

Example:

// get drag distance
var dragDistance = node.dragDistance();

// set distance
// node starts dragging only if pointer moved more then 3 pixels
node.dragDistance(3);
// or set globally
Konva.dragDistance = 3;

listening(listening)​

get/set listening attr. If you need to determine if a node is listening or not by taking into account its parents, use the isListening() method nodes with listening set to false will not be detected in hit graph so they will be ignored in container.getIntersection() method

Parameters:

  • listening (Boolean): Can be true, or false. The default is true.

Returns: Boolean

Inherited from: Konva.Node#listening

Example:

// get listening attr
var listening = node.listening();

// stop listening for events, remove node and all its children from hit graph
node.listening(false);

// listen to events according to the parent
node.listening(true);

preventDefault(preventDefault)​

get/set preventDefault By default all shapes will prevent default behavior of a browser on a pointer move or tap. that will prevent native scrolling when you are trying to drag&drop a node but sometimes you may need to enable default actions in that case you can set the property to false

Parameters:

  • preventDefault (Boolean)

Returns: Boolean

Inherited from: Konva.Node#preventDefault

Example:

// get preventDefault
var shouldPrevent = shape.preventDefault();

// set preventDefault
shape.preventDefault(false);

filters(filters)​

get/set filters. Supports function filters, CSS filter strings, or mixed arrays. CSS filters are applied using native browser performance when possible, function filters use ImageData manipulation. CSS filters automatically fall back to function filters in unsupported browsers.

Parameters:

  • filters (Array): array of filter functions and/or CSS filter strings

Returns: Array

Inherited from: Konva.Node#filters

Example:

// get filters
var filters = node.filters();

// set CSS filters only (no caching required, uses native performance)
node.filters(['blur(5px)', 'brightness(1.2)', 'contrast(1.5)']);

// set function filters only (caching required)
node.cache();
node.filters([Konva.Filters.Blur, Konva.Filters.Sepia, Konva.Filters.Invert]);

// mix CSS and function filters (caching required, uses fallback strategy)
node.cache();
node.filters([
  'blur(3px)',           // CSS filter
  Konva.Filters.Invert,  // function filter
  'brightness(1.5)'      // CSS filter
]);

visible(visible)​

get/set visible attr. Can be true, or false. The default is true. If you need to determine if a node is visible or not by taking into account its parents, use the isVisible() method

Parameters:

  • visible (Boolean)

Returns: Boolean

Inherited from: Konva.Node#visible

Example:

// get visible attr
var visible = node.visible();

// make invisible
node.visible(false);

// make visible (according to the parent)
node.visible(true);

transformsEnabled(enabled)​

get/set transforms that are enabled. Can be "all", "none", or "position". The default is "all"

Parameters:

  • enabled (String)

Returns: String

Inherited from: Konva.Node#transformsEnabled

Example:

// enable position transform only to improve draw performance
node.transformsEnabled('position');

// enable all transforms
node.transformsEnabled('all');

size(size)​

get/set node size

Parameters:

  • size (Object)
  • size.width (Number)
  • size.height (Number)

Returns: Object

Inherited from: Konva.Node#size

Example:

// get node size
var size = node.size();
var width = size.width;
var height = size.height;

// set size
node.size({
  width: 100,
  height: 200
});

dragBoundFunc(dragBoundFunc)​

get/set drag bound function. This is used to override the default drag and drop position.

Parameters:

  • dragBoundFunc (function)

Returns: function

Inherited from: Konva.Node#dragBoundFunc

Example:

// get drag bound function
var dragBoundFunc = node.dragBoundFunc();

// create vertical drag and drop
node.dragBoundFunc(function(pos){
  // important pos - is absolute position of the node
  // you should return absolute position too
  return {
    x: this.absolutePosition().x,
    y: pos.y
  };
});

draggable(draggable)​

get/set draggable flag

Parameters:

  • draggable (Boolean)

Returns: Boolean

Inherited from: Konva.Node#draggable

Example:

// get draggable flag
var draggable = node.draggable();

// enable drag and drop
node.draggable(true);

// disable drag and drop
node.draggable(false);

to(params)​

Tween node properties. Shorter usage of Konva.Tween object.

Parameters:

  • params (Object) (optional): tween params

Inherited from: Konva.Node#to

Example:

circle.to({
  x : 50,
  duration : 0.5,
  onUpdate: () => console.log('props updated'),
  onFinish: () => console.log('finished'),
});

blurRadius(radius)​

get/set blur radius. Use with Konva.Filters.Blur filter

Parameters:

  • radius (Integer)

Returns: Integer

Inherited from: Konva.Node#blurRadius

brightness(brightness)​

get/set filter brightness. The brightness is a number between -1 and 1.  Positive values brighten the pixels and negative values darken them. Use with Konva.Filters.Brighten filter.

Parameters:

  • brightness (Number): value between -1 and 1

Returns: Number

Inherited from: Konva.Node#brightness

contrast(contrast)​

get/set filter contrast. The contrast is a number between -100 and 100. Use with Konva.Filters.Contrast filter.

Parameters:

  • contrast (Number): value between -100 and 100

Returns: Number

Inherited from: Konva.Node#contrast

embossStrength(level)​

get/set emboss strength. Use with Konva.Filters.Emboss filter.

Parameters:

  • level (Number): between 0 and 1. Default is 0.5

Returns: Number

Inherited from: Konva.Node#embossStrength

embossWhiteLevel(embossWhiteLevel)​

get/set emboss white level. Use with Konva.Filters.Emboss filter.

Parameters:

  • embossWhiteLevel (Number): between 0 and 1. Default is 0.5

Returns: Number

Inherited from: Konva.Node#embossWhiteLevel

embossDirection(embossDirection)​

get/set emboss direction. Use with Konva.Filters.Emboss filter.

Parameters:

  • embossDirection (String): can be top-left, top, top-right, right, bottom-right, bottom, bottom-left or left The default is top-left

Returns: String

Inherited from: Konva.Node#embossDirection

embossBlend(embossBlend)​

get/set emboss blend. Use with Konva.Filters.Emboss filter.

Parameters:

  • embossBlend (Boolean)

Returns: Boolean

Inherited from: Konva.Node#embossBlend

enhance(amount)​

get/set enhance. Use with Konva.Filters.Enhance filter. -1 to 1 values

Parameters:

  • amount (Float)

Returns: Float

Inherited from: Konva.Node#enhance

hue(hue)​

get/set hsv hue in degrees. Use with Konva.Filters.HSV or Konva.Filters.HSL filter.

Parameters:

  • hue (Number): value between 0 and 359

Returns: Number

Inherited from: Konva.Node#hue

saturation(saturation)​

get/set hsv saturation. Use with Konva.Filters.HSV or Konva.Filters.HSL filter.

Parameters:

  • saturation (Number): 0 is no change, -1.0 halves the saturation, 1.0 doubles, etc..

Returns: Number

Inherited from: Konva.Node#saturation

luminance(value)​

get/set hsl luminance. Use with Konva.Filters.HSL filter.

Parameters:

  • value (Number): from -1 to 1

Returns: Number

Inherited from: Konva.Node#luminance

value(value)​

get/set hsv value. Use with Konva.Filters.HSV filter.

Parameters:

  • value (Number): 0 is no change, -1.0 halves the value, 1.0 doubles, etc..

Returns: Number

Inherited from: Konva.Node#value

kaleidoscopePower(power)​

get/set kaleidoscope power. Use with Konva.Filters.Kaleidoscope filter.

Parameters:

  • power (Integer): of kaleidoscope

Returns: Integer

Inherited from: Konva.Node#kaleidoscopePower

kaleidoscopeAngle(degrees)​

get/set kaleidoscope angle. Use with Konva.Filters.Kaleidoscope filter.

Parameters:

  • degrees (Integer)

Returns: Integer

Inherited from: Konva.Node#kaleidoscopeAngle

noise(noise)​

get/set noise amount. Must be a value between 0 and 1. Use with Konva.Filters.Noise filter.

Parameters:

  • noise (Number)

Returns: Number

Inherited from: Konva.Node#noise

pixelSize(pixelSize)​

get/set pixel size. Use with Konva.Filters.Pixelate filter.

Parameters:

  • pixelSize (Integer)

Returns: Integer

Inherited from: Konva.Node#pixelSize

levels(level)​

get/set levels. Must be a number between 0 and 1. Use with Konva.Filters.Posterize filter.

Parameters:

  • level (Number): between 0 and 1

Returns: Number

Inherited from: Konva.Node#levels

red(red)​

get/set filter red value. Use with Konva.Filters.RGB filter.

Parameters:

  • red (Integer): value between 0 and 255

Returns: Integer

Inherited from: Konva.Node#red

green(green)​

get/set filter green value. Use with Konva.Filters.RGB filter.

Parameters:

  • green (Integer): value between 0 and 255

Returns: Integer

Inherited from: Konva.Node#green

blue(blue)​

get/set filter blue value. Use with Konva.Filters.RGB filter.

Parameters:

  • blue (Integer): value between 0 and 255

Returns: Integer

Inherited from: Konva.Node#blue

alpha(alpha)​

get/set filter alpha value. Use with Konva.Filters.RGBA filter.

Parameters:

  • alpha (Float): value between 0 and 1

Returns: Float

Inherited from: Konva.Node#alpha

threshold(threshold)​

get/set threshold. Must be a value between 0 and 1. Use with Konva.Filters.Threshold or Konva.Filters.Mask filter.

Parameters:

  • threshold (Number)

Returns: Number

Inherited from: Konva.Node#threshold