@stianlarsen/react-light-beam

🚀 New Feature Alert!

We've added a new prop: scrollElement. This allows you to specify which element should have the scroll listener attached, giving you greater flexibility in using the LightBeam component!

A customizable React component that creates a light beam effect using conic gradients. The component is fully responsive and supports both light and dark modes. Ideal for adding dynamic and engaging visual elements to your web applications.

Preview

A preview of @stianlarsen/react-light-beam

Installation

npm install @stianlarsen/react-light-beam

or

yarn add @stianlarsen/react-light-beam

Usage

import { LightBeam } from "@stianlarsen/react-light-beam";
import "your-css-file.css"; // Include the necessary styles

const App = () => {
  return (
    <div className="your-container-class">
      <LightBeam
        id="unique-lightbeam"
        className="your-lightbeam-class"
        colorDarkmode="rgba(255, 255, 255, 0.8)"
        colorLightmode="rgba(0, 0, 0, 0.2)"
        fullWidth={0.8}
        maskLightByProgress={true}
        invert={false}
        scrollElement={window} // New prop to specify scroll element
      />
      <YourContentHere />
    </div>
  );
};

export default App;

Props

Prop Name	Type	Default Value	Description
id	string	undefined	Optional string representing a unique ID for the LightBeam container.
className	string	undefined	Optional string representing custom classes to be added to the LightBeam container.
colorLightmode	string	rgba(0,0,0, 0.5)	Optional string representing the color of the light beam in light mode.
colorDarkmode	string	rgba(255, 255, 255, 0.5)	Optional string representing the color of the light beam in dark mode.
fullWidth	number	1.0	Optional number between 0 and 1 representing the maximum width the light beam can reach.
maskLightByProgress	boolean	false	If true, the mask-image's linear gradient will start with the chosen color at 0% and the transparent part starting at 50%. As the user scrolls, it will dynamically change to have the transparent part at 95%, reducing the glow effect. If false, it will default to linear-gradient(to bottom, chosenColor 25%, transparent 95%).
invert	boolean	false	Optional boolean to invert the scroll progress calculation.
scrollElement	EventTarget or undefined	window	Optional prop for which element to attach the scroll listener to. This could be the window, document.body, or any other scrollable element.
onLoaded	undefined or () => void	undefined	Optional function to run when the component has mounted

Default Configuration

The component comes with the following default styles:

.react__light__beam {
  height: 500px;
  width: 100vw;
  transition: all 0.5s ease;
  will-change: auto;
}

These default styles ensure that the component is immediately visible when added to your application. However, for more effective use, you might want to customize its position and behavior.

Recommended Usage

For best results, it's recommended to position the LightBeam component as an absolutely positioned element within a relatively positioned container. This allows the light beam to cast light downwards over your content, creating a more dynamic and engaging visual effect.

Example:

<div className="container">
  <LightBeam className="lightBeam" />
</div>

And in your CSS or SCSS:

.container {
  position: relative;
  z-index: 1;

  .lightBeam {
    position: absolute;
    inset: 0;
    width: 100vw;
    height: 100%; // Important: Ensure the beam covers the entire height
    z-index: -1;
    margin-top: -300px; // Adjust as needed to position the light beam above the content
  }
}

Dark Mode Support

The component automatically adjusts between light and dark modes based on the user's system preferences. You can pass different colors for light and dark modes using the colorLightmode and colorDarkmode props.

Example

<LightBeam
  id="lightbeam-example"
  className="custom-lightbeam"
  colorDarkmode="rgba(255, 255, 255, 0.8)"
  colorLightmode="rgba(0, 0, 0, 0.2)"
  fullWidth={0.5}
  maskLightByProgress={true}
  invert={true}
  scrollElement={document.body} // Example usage of the new scrollElement prop
/>

License

MIT © Stian Larsen