The list below shows the major features supported by the latest ThorVG Lottie.

Shapes	Description
Ellipse	Circle / Ellipse
Group	Element Grouping
Path	Path Shape
Polystar	Polystar / Polygon
Rectangle	(Rounded) Rectangle

Strokes	Description
Dashes	Dashed stroke style
MiterLimit	Miter extension limit size
Offset	Dash offset position
StrokeCap	Butt / Round / Square
StrokeJoin	Miter / Bevel / Round
Width	Stroke width

Fills	Description
Color	Solid color
Opacity	Fill opacity
Fill Rule	NonZero / EvenOdd
Linear Gradient	Linear gradient fill
Radial Gradient	Radial gradient fill

Images	Description
Embedded	Base64 embedded image
Path	Local / URL image sources
Formats	JPG, PNG, WebP

Transforms	Description
Anchor Point	Anchor position
Auto Orient	Direction-based orientation
Opacity	Transform opacity
Parenting	Relative transformation hierarchy
Position	(Separate) X / Y coordinates
Scale	X / Y scale factors
Skew	Skew transformation

Interpolators	Description
Linear	Linear interpolation
Bezier	Cubic Bezier interpolation
Hold	Step / hold interpolation
Spatial Bezier	Position-based Bezier curve
Rove Across Time	Auto-smooth keyframes over time

Modifiers	Description
Offset Path	Offset applied to shape paths
PuckerBloat	Pull or push path points toward or away from center
Repeater	Repeat shape drawing with transforms
Roundness	Corner rounding for shapes
TrimPath	Trim path individually or simultaneously
ZigZag	Create zigzag patterns along shape paths

Masks	Description
Add	Add masking
Darken	Darken blend mask
Difference	Difference masking
Expansion	Mask offset expansion
Intersect	Intersect masking
Lighten	Lighten blend masking
Opacity	Alpha-based masking
Path Masking	Path-based clipping
Subtract	Subtract masking

Mattes	Description
Alpha	(Inverted) alpha blend masking
Luma	(Inverted) grayscale blend masking

LayerEffect	Description
Fill	Replace fill color
Drop Shadow	Drop shadow effect
Expression Control	Effect control via expressions
Gaussian Blur	Gaussian blur effect
Stroke	Stroke modifications
Tint	Tinting with single color
Tritone	Tinting with three colors

Text	Description
Alignment Options	Char / Word / Line / All alignment
Caps	Regular, AllCaps, SmallCaps
Document	Default text metrics & layout
Fonts	Local / URL fonts supported
Glyphs	Embedded glyphs
Justify	Horizontal text alignment
Outline	Text outline
Range Selector	Style range within text
Text Path	Text along a path
Tracking	Character spacing (tracking)

Audio	Description
Audio Assets	Embedded / Local / URL audio sources
Volume	Static / Animated volume (0–100)

Others	Description
Expressions	Lottie scripting (JavaScript-based)
Markers	Named animation time markers
Precomps	Pre-composition layers
Time Remap	Time remapping for animations
Time Stretch	Stretching animation duration
Slots	Property overriding (slots)

Overall Support Rate: 75% (72% fully supported + 3% partially supported)

Property	Type	Description	Status
time	number	Current time in seconds	✅
comp(name)	function	Get composition by name	✅
thisComp	object	Current composition reference	✅
thisLayer	object	Current layer reference	✅
thisProperty	object	Current property reference	✅
footage(name)	function	Get footage by name	❌
fromCompToSurface	function	Convert comp coordinates to surface	❌
createPath	function	Create path programmatically	❌
posterizeTime(fps)	function	Posterize time by FPS	❌
value	various	Current property value	✅
index	number	Layer index	✅

Property	Type	Description	Status
width	number	Composition width	✅
height	number	Composition height	✅
duration	number	Composition duration in seconds	✅
frameDuration	number	Duration of one frame (1/frameRate)	✅
name	string	Composition name	✅
layer(index/name)	function	Get layer by index or name	✅
numLayers	number	Total number of layers	✅
marker	object	Marker access	❌
marker.key(index)	function	Get marker by index	❌
marker.key(name)	function	Get marker by name	❌
marker.nearestKey(t)	function	Get nearest marker at time	❌
marker.numKeys	number	Total marker count	❌
activeCamera	object	Active camera reference	❌
ntscDropFrame	boolean	NTSC drop frame mode	❌
displayStartTime	number	Display start time	❌
shutterAngle	number	Motion blur shutter angle	❌
shutterPhase	number	Motion blur shutter phase	❌
bgColor	array	Background color	❌
pixelAspect	number	Pixel aspect ratio	❌

Property	Type	Description	Status
width	number	Layer width	✅
height	number	Layer height	✅
index	number	Layer index	✅
parent	object	Parent layer reference	✅
hasParent	boolean	Whether layer has parent	✅
inPoint	number	Layer in point (start frame)	✅
outPoint	number	Layer out point (end frame)	✅
startTime	number	Layer start time in seconds	✅
hasVideo	boolean	Whether layer has video	❌ *
hasAudio	boolean	Whether layer has audio	❌ *
enabled	boolean	Whether layer is enabled	✅
audioActive	boolean	Whether audio is active	❌ *
transform	object	Layer transform properties	✅
timeRemap	property	Time remapping property	✅
name	string	Layer name	⚠️ **
content(name)	function	Get content by name	✅
effect(name/index)	function	Get effect by name or index	✅
toComp(point)	function	Convert point to comp space	✅
sampleImage(...)	function	Sample image at point	❌
audioLevels	property	Audio level in decibels	❌

* Always returns false or 0
** Commented out due to JerryScript conflict issue

Property	Type	Description	Status
anchorPoint	array[2]	Anchor point coordinates	✅
position	array[2]	Position coordinates	✅
scale	array[2]	Scale percentages	✅
rotation	number	Rotation in degrees	✅
opacity	number	Opacity (0-100)	✅

Method	Parameters	Description	Status
value	-	Current property value	✅
valueAtTime(t)	time	Value at specific time	✅
velocity	-	Current velocity	❌ *
velocityAtTime(t)	time	Velocity at specific time	✅
speed	-	Current speed	❌ *
speedAtTime(t)	time	Speed at specific time	✅
wiggle(freq, amp, ...)	various	Randomize property value	✅
temporalWiggle(...)	various	Time-based wiggle	✅
loopIn(type, numKeys)	type, count	Loop before first keyframe	⚠️ **
loopOut(type, numKeys)	type, count	Loop after last keyframe	⚠️ **
loopInDuration(...)	type, time	Loop in by duration	⚠️ **
loopOutDuration(...)	type, time	Loop out by duration	⚠️ **
key(index)	index	Get keyframe by index	✅
key(markerName)	name	Get keyframe by marker	❌
nearestKey(t)	time	Get nearest keyframe at time	✅
numKeys	-	Total keyframe count	✅
propertyIndex	-	Property index	✅
propertyGroup(level)	level	Get property group	⚠️ ***
smooth(...)	various	Smooth property value	❌

* Returns 0 by default
** Only "cycle" and "pingpong" modes supported
*** Only level 1 supported

Type	Constant	Status
Cycle	"cycle"	✅
Ping Pong	"pingpong"	✅
Offset	"offset"	❌ *
Continue	"continue"	❌ *

* Logged as not supported

Function	Parameters	Description	Status
add(a, b) / $bm_add	values	Addition (1D, 2D, string)	✅
sub(a, b) / $bm_sub	values	Subtraction (1D, 2D)	✅
mul(a, b) / $bm_mul	values	Multiplication (1D, 2D)	✅
div(a, b) / $bm_div	values	Division (1D, 2D)	✅
sum(a, b) / $bm_sum	values	Sum (same as add)	✅
mod(a, b) / $bm_mod	values	Floating-point remainder (1D)	✅
clamp(v, min, max)	value, limits	Clamp value between limits	✅
linear(...)	various	Linear interpolation	✅
ease(...)	various	Cubic ease interpolation	✅
easeIn(...)	various	Ease in interpolation	✅
easeOut(...)	various	Ease out interpolation	✅
random()	-	Random value (0.0-1.0)	✅
degreesToRadians(deg)	degrees	Convert degrees to radians	✅
radiansToDegrees(rad)	radians	Convert radians to degrees	✅
lookAt(from, to)	points	Calculate rotation to look at	❌

Function	Parameters	Description	Status
dot(vec1, vec2)	vectors	Dot product	✅
cross(vec1, vec2)	vectors	Cross product (2D → scalar)	✅
normalize(vec)	vector	Normalize vector	✅
length(vec)	vector	Vector length/magnitude	✅

Property	Type	Description	Status
path	object	Path object	✅
points()	function	Get path points	✅
pointOnPath(progress)	function	Get point at progress (0-1)	✅
tangentOnPath(progress)	function	Get tangent at progress (0-1)	✅
inTangents	array	Path in tangent points	❌
outTangents	array	Path out tangent points	❌
isClosed	boolean	Whether path is closed	❌

Method	Description	Status
content(name)	Get content by name	✅
Group support	Group objects	✅
Path support	Path objects	✅
Polystar support	Polystar objects	✅
Trimpath support	Trimpath objects	✅

Property	Type	Description	Status
position	array[2]	Polystar position	✅
innerRadius	number	Inner radius	✅
outerRadius	number	Outer radius	✅
innerRoundness	number	Inner corner roundness	✅
outerRoundness	number	Outer corner roundness	✅
rotation	number	Rotation in degrees	✅
points	number	Number of points	✅

Property	Type	Description	Status
start	number	Trim start percentage	✅
end	number	Trim end percentage	✅
offset	number	Trim offset	✅

Method	Parameters	Description	Status
effect(name/index)	identifier	Get effect by name or index	✅
Effect property access	name	Get effect property by name	✅

Keyword	Description	Status
ADBE Root Vectors Group	Root vectors group	✅
ADBE Vectors Group	Vectors group	✅
ADBE Vector Shape	Vector shape path	✅

• ✅ Supported: "cycle", "pingpong"
• ⚠️ Not supported: "offset", "continue" (logged only)

• Only propertyGroup(1) is supported
• Higher levels return undefined

• All audio-related properties return default values (false or 0)
• No actual audio processing