Reinitilize the tinymce on ajax page load ?

Question

Reinitilize the tinymce on ajax page load ? i am using version 4 and used classes instead of id.

Using this on page refresh and after ajax page load:

tinymce.init({
        mode : "specific_textareas",
        editor_selector : MY_TEXTAREA_CLASS,
        plugins : 'link',
        menubar : false,
        height : 250,
        resize: false,
    });