Infinite Scroll

enqueue.php

<?php
/**
 * Load javascripts used by the theme
 */
function custom_theme_js() {
	wp_register_script(
		'infinite_scroll',
		get_template_directory_uri() . '/js/infinite-scroll.pkgd.min.js',
		array('jquery')
		null,
		true
	);
	
	if ( ! is_singular() ) {
		wp_enqueue_script( 'infinite_scroll' );
	}
}
add_action( 'wp_enqueue_scripts', 'custom_theme_js' );

/**
 * Infinite Scroll
 */
function custom_infinite_scroll_js() {
	if ( ! is_singular() ) { ?>
	<script>
	var infinite_scroll = {
		loading: {
			img: "<?php echo get_template_directory_uri(); ?>/images/ajax-loader.gif",
			msgText: "<?php _e( 'Loading the next set of posts...', 'custom' ); ?>",
			finishedMsg: "<?php _e( 'All posts loaded.', 'custom' ); ?>"
		},
		"nextSelector":"#nav-below .nav-previous a",
		"navSelector":"#nav-below",
		"itemSelector":"article",
		"contentSelector":"#content"
	};
	jQuery( infinite_scroll.contentSelector ).infinitescroll( infinite_scroll );
	</script>
	<?php
	}
}
add_action( 'wp_footer', 'custom_infinite_scroll_js', 100 );