Получить путь к теме wordpress в js файле.

functions.php

function setObjThemePath() {	
	wp_register_script( 'my-script', 'myscript_url' );
	wp_enqueue_script( 'my-script' );
	$translation_array = array( 'url' => get_stylesheet_directory_uri() );
	wp_localize_script( 'my-script', 'theme', $translation_array );		
}
add_action( 'wp_enqueue_scripts', 'setObjThemePath' );

script.js

var themeUrl = theme.url;
console.log(themeUrl);//http://domen-name.com/wp-content/themes/theme-name/