// /**
//  * A class to reveal content on a webpage with a fade-in effect after a specified delay.
//  *
//  * The `ContentRevealer` class is designed to hide elements initially and gradually reveal them
//  * with a fade-in effect after a specified delay when the window loads.
//  *
//  * @example
//  * // Usage:
//  * const revealer = new ContentRevealer(500, '.hidden-content');
//  *
//  * This will apply a 500ms delay and fade-in effect to all elements with the class `.hidden-content`.
//  */
// export class ContentRevealer {
//     // Duration of the fade-in effect in milliseconds.
//     private delay: number
//     // CSS selector used to target the elements to be revealed.
//     private selector: string

//     /**
//      * Creates an instance of ContentRevealer.
//      *
//      * @param delay - The delay in milliseconds before the content begins to reveal.
//      * @param selector - The CSS selector for the elements to be revealed.
//      */
//     constructor(delay: number, selector: string) {
//         this.delay = delay
//         this.selector = selector
//         // Bind the revealContent method to the window load event.
//         window.onload = this.revealContent.bind(this)
//     }

//     /**
//      * Reveals the content by fading in elements that match the provided selector.
//      *
//      * This method selects all elements matching the given selector, sets their initial
//      * opacity to 0, and then gradually changes the opacity to 1 after the specified delay.
//      *
//      * @private
//      */
//     private revealContent(): void {
//         // Select all elements that match the selector.
//         const elements = document.querySelectorAll(this.selector)

//         // Apply the fade-in effect to each element.
//         elements.forEach((element) => {
//             const el = element as HTMLElement

//             // Set the initial opacity to 0 and define the transition effect.
//             el.style.opacity = '0'
//             el.style.transition = `opacity ${this.delay}ms ease`

//             // Use a timeout to change the opacity to 1 after the specified delay.
//             setTimeout(() => {
//                 el.style.opacity = '1'
//             }, this.delay)
//         })
//     }
// }