Holy Loader is a lightweight and customizable top-loading progress bar component, specifically designed for React applications and optimized for Next.js with app router.
Want to see it in use? Visit: GameGator.
Also check out Holy Time, yet another (type-safe) date time library.
- Easy to integrate with any React application.
- Highly customizable with sensible defaults.
- Utilizes a custom implementation for smooth, aesthetic progress indications.
- Supports dynamic configuration for color, height, speed, easing, and more.
- Manual controls: Start & stop the loader yourself.
- i18n ready: Supports ltr(left-to-right) &rtl(right-to-left) layouts with thedirprop.
To install Holy Loader, run the following command in your project directory:
npm install holy-loaderOR
yarn add holy-loaderTo use Holy Loader in your Next.js application using the app router:
import HolyLoader from "holy-loader";
export default function RootLayout({ children }) {
  return (
    <html lang="en">
      <HolyLoader />
      {children}
    </html>
  );
}To use Holy Loader in your Next.js application using the pages router:
import HolyLoader from "holy-loader";
export default function App({ Component, pageProps }) {
  return (
    <>
      <HolyLoader />
      <Component {...pageProps} />;
    </>
  );
}import HolyLoader from "holy-loader";
export default function RootLayout({ children }) {
  return (
    <html lang="en">
      <HolyLoader
        color="linear-gradient(to right, #ff7e5f, #feb47b)"
        height="1rem"
        speed={250}
        easing="linear"
        showSpinner
      />
      {children}
    </html>
  );
}Have an async operation before an eventual route change? You might be interested in holy-loader's manual controls. These only work in client components!
'use client';
import { startHolyLoader, stopHolyLoader } from 'holy-loader';
try {
  startHolyLoader();
  await signOut()
} catch (error) {
  stopHolyLoader();
} finally {
  stopHolyLoader();
  /* OR */
  router.push('/');
}Prevent triggering the loader when clicking a Button within a Next link:
onClick={(e) => {
  e.preventDefault();
  e.nativeEvent.stopImmediatePropagation();
}}<HolyLoader /> accepts the following props for customization:
| Prop | Type | Description | Default | 
|---|---|---|---|
| color | string | Specifies the color of the top-loading bar. Accepts any valid CSS backgroundvalue, including gradients. | #59a2ff | 
| initialPosition | number | Sets the initial position of the top-loading bar as a percentage of the total width. | 0.08 | 
| height | numberorstring | Defines the height of the top-loading bar in pixels or CSS unit. | 4px | 
| easing | string | Specifies the easing function to use for the loading animation. Accepts any valid CSS easing string. | ease | 
| speed | number | Sets the animation speed of the top-loading bar in milliseconds. | 200 | 
| zIndex | number | Defines the z-index property of the top-loading bar, controlling its stacking order. | 2147483647 | 
| boxShadow | string | Sets the box-shadow property of the top-loading bar. Turned off by default. | null | 
| showSpinner | boolean | Determines whether to accompany the loading bar with a spinner. Turned off by default. | false | 
| ignoreSearchParams | boolean | Determines whether to ignore search parameters in the URL when triggering the loader. Turned off by default. | false | 
| dir | ltrorrtl | Sets the direction of the top-loading bar. | ltr | 
