particles

A quarto shortcode extension to add Particles.JS for html and revealjs formats.

Install

• Requires Quarto >= 1.4.0
• In the root of the quarto project, run in terminal:

quarto add royfrancis/quarto-particles

This will install the extension under the _extensions subdirectory.

Usage

{{< particles >}}

For more examples and usage guide, see here.

Arguments

Pass arguments to the shortcode with key=value. Nested keys follow the particles.js schema using dot notation, for example particles.size.value=3. All values map directly to the Particles.js configuration and merge with the defaults shown below.

Container attributes

Key	Default	Description
id	auto (quarto-particles-js-#)	HTML id for the wrapper div.
class	quarto-particles-js	Additional classes appended to the default (the element also gets the generated id as a class).
style	(none)	Inline styles applied to the wrapper (use to set width, height, background, etc.).
config	(none)	JSON string applied to the config. Useful for pasting a full particles.js preset.
config-mode (config_mode)	merge	When replace, the JSON supplied via config bypasses defaults; otherwise it merges with them.

The default quarto-particles-js class (defined in _extensions/particles/particles.css) sets the wrapper to width: 100% and height: 100%. Supply your own CSS or a style attribute when you need fixed dimensions or background colors. Each instance also adds its id as a class to make instance-specific styling easier.

particles.number

Key	Default	Description
particles.number.value	80	Base particle count.
particles.number.density.enable	true	Enable automatic density scaling.
particles.number.density.value_area	800	Area used for density calculation.

particles.color

Key	Default	Description
particles.color.value	#5b5b5b	Particle color (hex, RGB, or array).

particles.shape

Key	Default	Description
particles.shape.type	circle	Shape type (circle, edge, triangle, polygon, star, image).
particles.shape.stroke.width	0	Stroke width around shapes.
particles.shape.stroke.color	#000000	Stroke color.
particles.shape.polygon.nb_sides	5	Number of sides when type = polygon.
particles.shape.image.src	img/github.svg	Image source when type = image.
particles.shape.image.width	100	Render width for image shapes.
particles.shape.image.height	100	Render height for image shapes.

particles.opacity

Key	Default	Description
particles.opacity.value	1	Base opacity (0–1).
particles.opacity.random	false	Randomize each particle's opacity.
particles.opacity.anim.enable	false	Animate opacity.
particles.opacity.anim.speed	1	Opacity animation speed.
particles.opacity.anim.opacity_min	0.1	Minimum opacity during animation.
particles.opacity.anim.sync	false	Synchronize opacity animation across particles.

particles.size

Key	Default	Description
particles.size.value	5	Base size in pixels.
particles.size.random	true	Randomize particle sizes.
particles.size.anim.enable	false	Animate particle size.
particles.size.anim.speed	40	Size animation speed.
particles.size.anim.size_min	0.1	Minimum size during animation.
particles.size.anim.sync	false	Synchronize size animation across particles.

particles.line_linked

Key	Default	Description
particles.line_linked.enable	true	Draw linking lines between particles.
particles.line_linked.distance	150	Maximum distance for line connection.
particles.line_linked.color	#5b5b5b	Line color.
particles.line_linked.opacity	0.4	Line opacity (0–1).
particles.line_linked.width	1	Line width in pixels.

particles.move

Key	Default	Description
particles.move.enable	true	Enable particle motion.
particles.move.speed	1	Movement speed.
particles.move.direction	none	Direction (none, top, top-right, etc.).
particles.move.random	false	Randomize movement direction.
particles.move.straight	false	Force straight movement.
particles.move.out_mode	out	Out-of-bounds behavior (out, bounce, etc.).
particles.move.bounce	false	Enable canvas edge bounce.
particles.move.attract.enable	false	Activate particle attraction.
particles.move.attract.rotateX	600	Horizontal attraction strength.
particles.move.attract.rotateY	1200	Vertical attraction strength.

interactivity

Key	Default	Description
interactivity.detect_on	canvas	Interaction detection element (canvas or window).
interactivity.events.onhover.enable	true	Enable hover interaction.
interactivity.events.onhover.mode	repulse	Hover mode (grab, bubble, repulse).
interactivity.events.onclick.enable	true	Enable click interaction.
interactivity.events.onclick.mode	push	Click mode (push, remove, bubble, repulse).
interactivity.events.resize	true	Recalculate on canvas resize.

interactivity.modes

Key	Default	Description
interactivity.modes.grab.distance	400	Max grab distance.
interactivity.modes.grab.line_linked.opacity	1	Line opacity while grabbing.
interactivity.modes.bubble.distance	400	Trigger distance for bubble mode.
interactivity.modes.bubble.size	40	Target size during bubble effect.
interactivity.modes.bubble.duration	2	Bubble animation duration (s).
interactivity.modes.bubble.opacity	8	Target opacity during bubble effect.
interactivity.modes.bubble.speed	3	Bubble animation speed.
interactivity.modes.repulse.distance	50	Repulse distance.
interactivity.modes.repulse.duration	0.4	Repulse effect duration (s).
interactivity.modes.push.particles_nb	4	Particles added per click in push mode.
interactivity.modes.remove.particles_nb	2	Particles removed per click in remove mode.

Global

Key	Default	Description
retina_detect	true	Enable retina display detection.

Example

{{< particles
  style="width: 100%; height: 320px; background-color: #0b1c26"
  particles.number.value=120
  particles.color.value="#55acee"
  particles.move.speed=2
  interactivity.events.onhover.mode=grab
  interactivity.modes.grab.distance=250
>}}

Acknowledgements

Built on Particles.JS.

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2026 • Roy Francis