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

Localstorage is probably the way to go. Here is a bit of info on it: http://diveintohtml5.info/storage.html

Basically it allows you to store small amounts of data on the user's machine (up to 5mb in most browsers). So all you need to do is set a flag in there letting you know that the user has already visited, and if that flag isn't present on page load, show the message.

// Run function on load, could also run on dom ready
window.onload = function() {
    // Check if localStorage is available (IE8+) and make sure that the visited flag is not already set.
    if(typeof window.localStorage !== "undefined" && !localStorage.getItem('visited')) {
         // Set visited flag in local storage
         localStorage.setItem('visited', true);
         // Alert the user
         alert("Hello my friend. This is your first visit.");   
    }
}

This should work in all browsers where local storage is available. See caniuse.com for reference. http://caniuse.com/#search=localstorage