Unable to declare AOS library in functions
The function get_template_directory_uri() returns the path without trailing slash. So you need to write wp_register_script( ‘aosjs’, get_template_directory_uri() . ‘/js/aos.js’,…) Note the slash before “https://wordpress.stackexchange.com/questions/328563/js/aos.js”. What good for is this line, the script file should already be loaded: <script src=”https://wordpress.stackexchange.com/questions/328563/js/aos.js”></script>