turbolinks.js

import Turbolinks from "turbolinks";

Turbolinks.start();

// When you just clicked on a link
document.addEventListener("turbolinks:before-visit", e => {
    ...
});

// When the transition is happening
document.addEventListener("turbolinks:visit", e => {
    ...
 });

// When the page is loaded AND injected into the DOM
document.addEventListener("turbolinks:load", e => {
    ...
});