Use DOMContentLoaded to make sure the DOM is ready and loaded

- The `DOMContentLoaded` event can be used to make sure the DOM is loaded. - Note that external resources like images may not be loaded at that point. - via: https://javascript.info/onload-ondomcontentloaded

Example:

Code

function kickoff() {
    console.log("kickoff")
}
        
document.addEventListener("DOMContentLoaded", kickoff);

You can also do it with an anonymous funciton:

Code

document.addEventListener("DOMContentLoaded", () => {
    console.log("DOMContentLoaded")
});