How can I create a “first-load” event in html or Javascript?

Question

I\'m starter. I have an idea. I want to implement an event like this. Is it possible?

Answer 1

Use on load. It will execute when the page loads, and you will see your alert. Good luck with your knowledge.

    
    
    
    
    
    
Hello World!
    
     

Edit: You can get more advance and set cookies to see if it's the user's first time, but I'm not sure you're at that level yet, but anyways:

You could for example set a localStorage property like

if(!localStorage["alertdisplayed"]) {
    alert("Your text")
    localStorage["alertdisplayed"] = true
}

Note that localStorage isn't supported by older Browsers.

An alternative would be setting a Cookie and check against its existence

If you don't know how to set / get cookies with javascript, i would suggest, reading this article: https://developer.mozilla.org/en-US/docs/Web/API/document.cookie?redirectlocale=en-US&redirectslug=DOM%2Fdocument.cookie