React Fast Marquee — Shadow‑DOM friendly fork

This fork removes the runtime inline <style> injection from the original react-fast-marquee and ships the stylesheet as a regular Marquee.scss / marquee.css so it can be processed by your own build pipeline (e.g. MiniCssExtract + stylesInjector into Shadow DOM). The JavaScript API is 100 % compatible with the upstream package.

Demo

Check out the demo here and play around with some sample marquees.

Installation

If you're using npm, in the command prompt run:

1npm install react-fast-marquee-shadow-dom

If you're using yarn, run:

1yarn add react-fast-marquee-shadow-dom

Importing the stylesheet

The component no longer injects its own styles.
Import the generated CSS once in your Shadow‑DOM entry (or wherever your global styles live):

1import 'react-fast-marquee-shadow-dom/marquee.css';

Usage

To use the component, first import Marquee into your file:

1import Marquee from "react-fast-marquee-shadow-dom";

Then wrap the <Marquee> tags around any component or text you'd like to slide.

1<Marquee>
2  I can be a React component, multiple React components, or just some text.
3</Marquee>

A sample file might look like this:

1import React from "react";
2import MyComponent from "../components/MyComponent";
3import Marquee from "react-fast-marquee-shadow-dom";
4
5const App = () => (
6  <Marquee>
7    <MyComponent />
8    <MyComponent />
9    <MyComponent />
10  </Marquee>
11);
12
13export default App;

Props

Property	Type	Default	Description
style	CSSProperties	{}	Inline style for the container div
className	string	""	Name of the css class to style the container div
autoFill	boolean	false	Whether to automatically fill blank space in the marquee with copies of the children or not
play	boolean	true	Whether to play or pause the marquee
pauseOnHover	boolean	false	Whether to pause the marquee when hovered
pauseOnClick	boolean	false	Whether to pause the marquee when clicked
direction	"left" | "right"| "up"| "down"	"left"	The direction the marquee slides Warning: Vertical marquees are currently experimental and may be buggy. Please swap the values of the marquee's height and width when setting them
speed	number	50	Speed calculated as pixels/second
delay	number	0	Duration to delay the animation after render, in seconds
loop	number	0	The number of times the marquee should loop, 0 is equivalent to infinite
gradient	boolean	false	Whether to show the gradient or not
gradientColor	string	white	The color of the gradient
gradientWidth	number | string	200	The width of the gradient on either side
onFinish	{() => void}	null	A callback for when the marquee finishes scrolling and stops. Only calls if loop is non-zero.
onCycleComplete	{() => void}	null	A callback for when the marquee finishes a loop. Does not call if maximum loops are reached (use onFinish instead).
onMount	{() => void}	null	A callback function that is invoked once the marquee has finished mounting. It can be utilized to recalculate the page size, if necessary.
children	ReactNode	null	The children rendered inside the marquee