function enqueue_income_rank_script() {
if ( is_page('about-page') ) {
wp_enqueue_script(
'income-rank-script',
get_stylesheet_directory_uri() . '/js/income-rank.js',
array(),
null,
true
);
}
}
add_action( 'wp_enqueue_scripts', 'enqueue_income_rank_script' );