Well, I've found this custom alert on a site, and I'm looking forward to putting it on my page, to enter the page, the alert will appear.
I could not follow the site statement, because in their example it's about to appear when I click on a button, and I do not understand anything about Javascript.
I'll want to use the second example:
swal("Here's the title!", "...and here's the text!");
Someone could make a template as an answer for me to put on my page, thank you!