/**
 * File back-to-top.js.
 *
 * Handles back to top button functionality.
 */
( function() {
	const brevityBackToTopButton = document.getElementById( 'back-to-top' );

	// Return early if button doesn't exist.
	if ( ! brevityBackToTopButton ) {
		return;
	}

	// Show/hide button based on scroll position
	function brevityToggleBackToTop() {
		if ( window.pageYOffset > 300 ) {
			brevityBackToTopButton.style.display = 'flex';
		} else {
			brevityBackToTopButton.style.display = 'none';
		}
	}

	// Scroll to top when button is clicked
	brevityBackToTopButton.addEventListener( 'click', function( e ) {
		e.preventDefault();
		window.scrollTo( {
			top: 0,
			behavior: 'smooth',
		} );
	} );

	// Listen for scroll events
	window.addEventListener( 'scroll', brevityToggleBackToTop );

	// Check initial scroll position
	brevityToggleBackToTop();
}() );