I try it, but don’t know how you do this.
There are several files,
Add you the js files with this Wp function in the wp_footer hook? wp_enqueue_script( 'script', plugin_dir_url( __FILE__ ) . '/js/script.js', array( 'jquery' ), '1.0.0', true );
And where adding the json-file?
Have you a small step-by-step tutorial how do this?
I know there is a plugin for that, but i will learn it without the plugin so i understand how it works.