Listener Javascript al caricamento pagine e caricamento risorse

← jQuery e Javascript

// pagina pronta
document.addEventListener('readystatechange', event => {

    // When HTML/DOM elements are ready:
    if (event.target.readyState === "interactive") {   //does same as:  ..addEventListener("DOMContentLoaded"..
        alert("hi 1");
    }

    // When window loaded ( external resources are loaded too- `css`,`src`, etc...)
    if (event.target.readyState === "complete") {
        alert("hi 2");
    }
});