window onload

• The window.onload event fires after all content on the page (images, css, iframe, js files) has loaded.
• DOMContentLoaded runs much earlier (when the HTML is loaded).

Example

Kopyala

                        document.addEventListener("DOMContentLoaded", () => {
    console.log("Sadece HTML DOM yüklendi (erken çalışır).");
});

window.onload = () => {
    console.log("Tüm sayfa (resimler, css dahil) yüklendi (geç çalışır).");
};