How to put this Alert JS to appear when entering the page

Question

Guys, I found this Alert custom on a website, and I’m willing to put it on my page, to enter the page, to appear the Alert.

I could not follow the instruction of the site, because in their example is to appear at the click of a button, and I do not understand anything Javascript.

I want to use the second example:

swal("Here's the title!", "...and here's the text!");

Could someone make a template as an answer for me put on my page, thank you!

Answer 1

One way to do this is to add this library to the HTML and use it globally.

Behold:

swal("Meu alerta", "Olá alerta :D !");

<script src="https://unpkg.com/sweetalert/dist/sweetalert.min.js"></script>

I followed the guide instructions.

Answer 2

Take this example: It’s simple! Now it’s up to you to personalize with your information.

https://jsfiddle.net/v0tnfu1h/1/

Answer 3

How do you add an alert when you reset the numbers?

<button id="bcen" onclick="this.textContent --;" value="10000">10000</button>
<script>
document.getElementById("bcen").style.align = "center"; // Center
document.getElementById("bcen").style.width =
"300px"; //Size
document.getElementById("bcen").style.align = "center"; // Center
document.getElementById("bcen").style.height =
"200px"; //Size
</script>