You need to localize your script.
PHP
function custom_load_scripts() {
wp_enqueue_script('your-script', '/your-script.js');
wp_localize_script('your-script', 'your_js_obj_name', array(
'error' => __("<p>Inutile de l'ajouter plusieurs fois</p>",'mytheme')
)
);
}
add_action('wp_enqueue_scripts', 'custom_load_scripts');
Now you have access to that data in your javascript file like:
JS
your_js_obj_name.error // --> '<p>Inutile de l'ajouter plusieurs fois</p>'
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…